



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
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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



