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A134544 A051731 * A002260. 1
1, 2, 2, 2, 2, 3, 3, 4, 3, 4, 2, 2, 3, 4, 5, 4, 6, 6, 4, 5, 6, 2, 2, 3, 4, 5, 6, 7, 4, 6, 6, 8, 5, 6, 7, 8, 3, 4, 6, 4, 5, 6, 7, 8, 9, 4, 6, 6, 8, 10, 6, 7, 8, 9, 10 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A007437: (1, 4, 7, 14, 16, 3, 29, 50,...). Left border = A000010.

LINKS

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

FORMULA

A051731 * A002260 as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

2, 2;

2, 2, 3;

3, 4, 3, 4;

2, 2, 3, 4, 5;

4, 6, 6, 4, 5, 6;

2, 2, 3, 4, 5, 6, 7;

4, 6, 6, 8, 5, 6, 7, 8;

3, 4, 6, 4, 5, 6, 7, 8, 9;

4, 6, 6, 8, 10, 6, 7, 8, 9, 10;

...

CROSSREFS

Cf. A054731, A007437, A000010.

Sequence in context: A333701 A140682 A049317 * A230514 A106161 A105588

Adjacent sequences:  A134541 A134542 A134543 * A134545 A134546 A134547

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Oct 31 2007

STATUS

approved

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Last modified June 15 02:56 EDT 2021. Contains 345042 sequences. (Running on oeis4.)