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A135222 A049310 + A000012 - I. 1
1, 1, 1, 2, 1, 1, 1, 3, 1, 1, 2, 1, 4, 1, 1, 1, 4, 1, 5, 1, 1, 2, 1, 7, 1, 6, 1, 1, 1, 5, 1, 11, 1, 7, 1, 1, 2, 1, 11, 1, 16, 1, 8, 1, 1, 1, 6, 1, 21, 1, 22, 1, 9, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Row sums = A081659: (1, 2 4, 6, 9, 13, 19, 28,...).

LINKS

Table of n, a(n) for n=1..55.

FORMULA

A049310 + A000012 - Identity matrix, as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

1, 1;

2, 1, 1;

1, 3, 1, 1;

2, 1, 4, 1, 1;

1, 4, 1, 5, 1, 1;

2, 1, 7, 1, 6, 1, 1;

1, 5, 1, 11, 1, 7, 1, 1;

2, 1, 11, 1, 16, 1, 8, 1, 1;

...

CROSSREFS

Cf. A049310, A081659.

Sequence in context: A318812 A138904 A196660 * A285706 A124094 A101950

Adjacent sequences:  A135219 A135220 A135221 * A135223 A135224 A135225

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Nov 23 2007

STATUS

approved

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Last modified March 18 22:11 EDT 2019. Contains 321305 sequences. (Running on oeis4.)