A131374 - OEIS

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

(list; table; graph; refs; listen; history; text; internal format)

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:

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