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A170899 Triangle read by rows, obtained by subtracting 1 from the terms of A170898 and dividing by 2. 2
0, 0, 1, 0, 1, 2, 3, 0, 1, 2, 4, 4, 3, 6, 7, 0, 1, 2, 4, 4, 4, 8, 12, 8, 3, 6, 11, 13, 9, 15, 15, 0, 1, 2, 4, 4, 4, 8, 12, 8, 4, 8, 14, 18, 16, 20, 28, 16, 3, 6, 11, 13, 13, 21, 33, 29, 13, 15, 27, 34, 24, 34, 31, 0, 1, 2, 4, 4, 4, 8, 12, 8, 4, 8, 14, 18, 16, 20, 28, 16, 4, 8, 14 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

Row k has 2^k terms.

I was hoping this would have a simple formula, analogous to that for A147582!

It appears that this is also a tetrahedron E(m,i,j), m>=0, i>=0, j>=0, in which the slice m is a triangle read by rows: R(i,j) in which row i has length A011782(i). - Omar E. Pol, Feb 13 2013

It appears that in the slice m (of the tetrahedron mentioned above) the differences between the first 2^(m-3) elements of row m-1 and the first 2^(m-3) elements of row m give the first 2^(m-3) elements of A169787, if m >= 3. Also it appears that the right border of slice m gives the first m powers of 2 together with 0. See the second arrangement in Example section. - Omar E. Pol, Mar 16 2013

LINKS

Table of n, a(n) for n=0..82.

EXAMPLE

Triangle begins:

0;

0,1;

0,1,2,3;

0,1,2,4,4,3,6,7;

0,1,2,4,4,4,8,12,8,3,6,11,13,9,15,15;

0,1,2,4,4,4,8,12,8,4,8,14,18,16,20,28,16,3,6,11,13,13,21, 33,29,13,15,27,34,24,34,31;

0,1,2,4,4,4,8,12,8,4,8,14,18,16,20,28,16,4,8,14,18,18,26,42,42,24,20,36,50,46,50,62,32,3,6,11,13,13,21,33,29,17,21, 37,51,51,57,77,61,21,15,27,34,36,52,80,80,44,38,62,81,58, 73,63;

0,1,2,4,4,4,8,12,8,4,8,14,18,16,20,28,16,4,8,14,18,18,26,42,42,24,20,36,50,46,50,62,32,4,8,14,18,18,26,42,42,26,26, 46,66,70,74,98,90,40,20,36,50,54,70,110,126,86,58,86,124, 118,118,132,64,3,6,11,13,13,21,33,29,17,21,37,51,51,57,77,61,25,21,37,51,55,71,111,127,91,65,93,137,143,147,175,127,37,15,27,34,36,52,80,80,56,56,88,126,136,150,192,172,84,46,62,81,90,124,184,196,124,96,139,183,131,152,127;

...

From Omar E. Pol, Feb 13 2013 (Start):

When written as a tetrahedron the slices 0-7 are:

0;

..

1;

0;

..

1;

2;

3,0;

....

1;

2;

4,4;

3,6,7,0;

........

1;

2;

4,4;

4,8,12,8;

3,6,11,13,9,15,15,0;

....................

1;

2;

4,4;

4,8,12,8;

4,8,14,18,16,20,28,16;

3,6,11,13,13,21,33,29,13,15,27,34,24,34,31,0;

.............................................

1;

2;

4,4;

4,8,12,8;

4,8,14,18,16,20,28,16;

4,8,14,18,18,26,42,42,24,20,36,50,46,50,62,32;

3,6,11,13,13,21,33,29,17,21,37,51,51,57,77,61,21,15,27,34,36,52,80,80,44,38,62,81,58,73,63,0;

..........................................................

1;

2;

4,4;

4,8,12,8;

4,8,14,18,16,20,28,16;

4,8,14,18,18,26,42,42,24,20,36,50,46,50,62,32;

4,8,14,18,18,26,42,42,26,26,46,66,70,74,98,90,40,20,36,50,54,70,110,126,86,58,86,124,118,118,132,64;

3,6,11,13,13,21,33,29,17,21,37,51,51,57,77,61,25,21,37,51,55,71,111,127,91,65,93,137,143,147,175,127,37,15,27,34,36,52,80,80,56,56,88,126,136,150,192,172,84,46,62,81,90,124,184,196,124,96,139,183,131,152,127,0;

..........................................................

(End)

CROSSREFS

Cf. A139250, A151723, A151724, A170898.

Sequence in context: A212598 A274650 A294648 * A221321 A179392 A106730

Adjacent sequences:  A170896 A170897 A170898 * A170900 A170901 A170902

KEYWORD

nonn,tabf

AUTHOR

N. J. A. Sloane, Jan 10 2010

STATUS

approved

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Last modified September 18 11:42 EDT 2018. Contains 315130 sequences. (Running on oeis4.)