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A127737 A002260 * A127701. 0
1, 3, 4, 3, 7, 9, 3, 7, 13, 16, 3, 7, 13, 21, 25, 3, 7, 13, 21, 31, 36, 3, 7, 13, 21, 31, 43, 49, 3, 7, 13, 21, 31, 43, 57, 64, 3, 7, 13, 21, 31, 43, 57, 73, 81, 3, 7, 13, 21, 31, 43, 57, 73, 91, 100 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Deleting the right border (1, 4, 9, 16,...), rows tend to A002061 starting (3, 7, 13, 21, 31,...). Row sums = A108766: (1, 7, 19, 39, 69, 111,...)

LINKS

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

FORMULA

A002260 * A127701 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

3, 4;

3, 7, 9;

3, 7, 13, 16;

3, 7, 13, 21, 25;

...

CROSSREFS

Cf. A002260, A127701, A108766, A002061.

Sequence in context: A111970 A291317 A141730 * A299416 A163108 A077005

Adjacent sequences:  A127734 A127735 A127736 * A127738 A127739 A127740

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jan 27 2007

STATUS

approved

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Last modified April 20 17:54 EDT 2019. Contains 322310 sequences. (Running on oeis4.)