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A132128 A051340 + A000027 - A000012. +0
1
1, 2, 4, 4, 5, 8, 7, 8, 9, 13, 11, 12, 13, 14, 19, 16, 17, 18, 19, 20, 26, 22, 23, 24, 25, 26, 27, 34, 29, 30, 31, 32, 33, 34, 35, 43, 37, 38, 39, 40, 41, 42, 43, 44, 53 (list; table; graph; listen)
OFFSET

1,2

COMMENT

Row sums = A132127: (1, 6, 17, 37, 69, 116, 181,...)

FORMULA

A051340 + A000027 - A000012 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

2, 4;

4, 5, 8;

7, 8, 9, 13;

11, 12, 13, 14, 19;

16, 17, 18, 19, 20, 26;

...

CROSSREFS

Cf. A051340, A000027, A000012, A132127.

Sequence in context: A118001 A111138 A035625 this_sequence A084824 A121528 A049782

Adjacent sequences: A132125 A132126 A132127 this_sequence A132129 A132130 A132131

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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