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A131894 A131843 * A000012. 2
1, 6, 3, 11, 6, 5, 16, 9, 8, 7, 21, 12, 11, 10, 9, 26, 15, 14, 13, 12, 11, 31, 18, 17, 16, 15, 14, 13, 36, 21, 20, 19, 18, 17, 16, 15, 41, 24, 23, 22, 21, 20, 19, 18, 17, 46, 27, 26, 25, 24, 23, 22, 21, 20, 19 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Left column = A016861, 5n + 1: (1, 6, 11, 16, 21, 26,...). Row sums = A131895: (1, 9, 22, 40, 63,...). Triangle A131896 = A000012 * A131843.

LINKS

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

FORMULA

Triangle read by rows, partial row sums starting from the right, of A131843.

EXAMPLE

First few rows of the triangle are:

1;

6, 3;

11, 6, 5;

16, 9, 8, 7;

21, 12, 11, 10, 9;

26, 15, 14, 13, 12, 11;

...

CROSSREFS

Cf. A131843, A131895, A131896.

Sequence in context: A112456 A060534 A060445 * A040033 A165998 A322091

Adjacent sequences:  A131891 A131892 A131893 * A131895 A131896 A131897

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.)