A131374 A046854 + A065941 - A049310.

1, 2, 1, 1, 2, 1, 2, 1, 3, 1, 1, 3, 3, 3, 1, 2, 1, 7, 3, 4, 1, 1, 4, 5, 8, 6, 4, 1, 2, 1, 12, 5, 15, 6, 5, 1, 1, 5, 7, 16, 15, 16, 10, 5, 1, 2, 1, 18, 7, 36, 15, 27, 10, 6, 1

Offset

0,2

Comments

Row sums = the Lucas numbers, A000032 starting (1, 3, 4, 7, 11, 18,...).

Links

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

Formula

A046854 + A065941 - A049310 as infinite lower triangular matrices.

Example

First few rows of the triangle are:
1;
2, 1;
1, 2, 1;
2, 1, 3, 1;
1, 3, 3, 3, 1
2, 1, 7, 3, 4, 1;
1, 4, 5, 8, 6, 4, 1;
...

Crossrefs

Cf. A046854, A065941, A049310, A000032.

Sequence in context: A051194 A134838 A049843 * A360286 A207409 A013632

Adjacent sequences: A131371 A131372 A131373 * A131375 A131376 A131377

Keyword

nonn,tabl

Author

Gary W. Adamson, Jul 03 2007

Status

approved