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A137614 Triangle read by rows: A000012 * A047812 as infinite lower triangular matrices. 1
1, 2, 1, 3, 4, 1, 4, 9, 8, 1, 5, 18, 28, 12, 1, 6, 31, 76, 63, 19, 1, 7, 51, 176, 232, 131, 27, 1, 8, 79, 370, 693, 617, 248, 39, 1, 9, 119, 722, 1821, 2284, 1458, 450, 53, 1, 10, 173, 1337, 4338, 7243, 6553, 3211, 773, 74, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Row sums = A014138: (1, 3, 8, 22, 64, 196, 625,...).

LINKS

Table of n, a(n) for n=0..54.

EXAMPLE

First few rows of the triangle are:

1;

2, 1;

3, 4, 1;

4, 9, 8, 1;

5, 18, 28, 12, 1;

6, 31, 76, 63, 19, 1;

7, 51, 176, 232, 131, 27, 1;

...

CROSSREFS

Cf. A047812, A014138.

Sequence in context: A107616 A055208 A051128 * A204213 A143326 A186686

Adjacent sequences:  A137611 A137612 A137613 * A137615 A137616 A137617

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jan 30 2008

STATUS

approved

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Last modified October 15 11:03 EDT 2018. Contains 316224 sequences. (Running on oeis4.)