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A158902 Triangle read by rows: the matrix product A051731 * A158821. 4
1, 2, 1, 3, 0, 1, 5, 1, 0, 1, 5, 0, 0, 0, 1, 9, 1, 1, 0, 0, 1, 7, 0, 0, 0, 0, 0, 1, 12, 1, 0, 1, 0, 0, 0, 1, 11, 0, 1, 0, 0, 0, 0, 0, 1, 15, 1, 0, 0, 1, 0, 0, 0, 0, 1, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 23, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..78.

FORMULA

T(n,n) = 1.

T(n,1) = A158901(n).

EXAMPLE

First few rows of the triangle =

1;

2, 1;

3, 0, 1;

5, 1, 0, 1;

5, 0, 0, 0, 1;

9, 1, 1, 0, 0, 1;

7, 0, 0, 0, 0, 0, 1;

12, 1, 0, 1, 0, 0, 0, 1

11, 0, 1, 0, 0, 0, 0, 0, 1;

15, 1, 0, 0, 1, 0, 0, 0, 0, 1;

11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;

23, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1;

13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;

21, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1;

...

MAPLE

A158902 := proc(n, k)

    add( A051731(n, j)*A158821(j-1, k-1), j=k..n) ;

end proc:

seq(seq(A158902(n, k), k=1..n), n=1..12) ; # R. J. Mathar, Jan 08 2015

CROSSREFS

Cf. A158821, A051731, A158901, A000203 (row sums).

Sequence in context: A113287 A195665 A096798 * A137587 A168021 A137639

Adjacent sequences:  A158899 A158900 A158901 * A158903 A158904 A158905

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson and Mats Granvik, Mar 29 2009

EXTENSIONS

Wrong A-number in definition corrected by Robert Israel, Jan 08 2015

STATUS

approved

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Last modified June 20 08:06 EDT 2019. Contains 324229 sequences. (Running on oeis4.)