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A132119 A002260 + A000027 - A000012 as infinite lower triangular matrices. +0
2
1, 3, 3, 6, 5, 6, 10, 8, 9, 10, 15, 12, 13, 14, 15, 21, 17, 18, 19, 20, 21, 28, 23, 24, 25, 26, 27, 28, 36, 30, 31, 32, 33, 34, 35, 36, 45, 38, 39, 40, 41, 42, 43, 44, 45, 55, 47, 48, 49, 50, 51, 52, 53, 54, 55 (list; table; graph; listen)
OFFSET

1,2

COMMENT

Row sums = A132127: (1, 6, 17, 37, 69, 116,...).

EXAMPLE

First few rows of the triangle are:

1;

3, 3;

6, 5, 6;

10, 8, 9, 10;

15, 12, 13, 14, 15;

21, 17, 18, 19, 20, 21;

...

CROSSREFS

Cf. A002260, A000027, A000012, A132127.

Sequence in context: A137462 A050346 A142149 this_sequence A023822 A071047 A080512

Adjacent sequences: A132116 A132117 A132118 this_sequence A132120 A132121 A132122

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 10 2007

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Last modified December 3 01:16 EST 2008. Contains 151161 sequences.


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