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A131896 A000012 * A131843. 2
1, 4, 3, 9, 4, 5, 16, 5, 6, 7, 25, 6, 7, 8, 9, 36, 7, 8, 9, 10, 11, 49, 8, 9, 10, 11, 12, 13, 64, 9, 10, 11, 12, 13, 14, 15, 81, 10, 11, 12, 13, 14, 15, 16, 17, 100, 11, 12, 13, 14, 15, 16, 17, 18, 19 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A000566: (1, 7, 18, 34, 55, 81,...), binomial transform of (1, 6, 5, 0, 0, 0,...). A131894 = A131843 * A000012.

LINKS

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

FORMULA

A000012 * A131843 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

4, 3;

9, 4, 5;

16, 5, 6, 7;

25, 6, 7, 8, 9;

36, 7, 8, 9, 10, 11;

49, 8, 9, 10, 11, 12, 13;

64, 9, 10, 11, 12, 13, 14, 15;

...

CROSSREFS

Cf. A131843, A000566.

Sequence in context: A232814 A074123 A016704 * A114380 A293130 A103825

Adjacent sequences:  A131893 A131894 A131895 * A131897 A131898 A131899

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jul 24 2007

STATUS

approved

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Last modified August 21 06:54 EDT 2019. Contains 326162 sequences. (Running on oeis4.)