A137640 - OEIS

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A137640

Row sums of triangle A137639.

1, 3, 4, 8, 9, 17, 19, 32, 40, 57, 71, 106, 129, 176

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

FORMULA

A026794 * A000005. (A026794 as an infinite lower triangular matrix and d(n) as a vector).

EXAMPLE

a(4) = 8 = sum of row 4 terms of triangle A137639: (7 + 2 + 0 + 1).

a(4) = 8 = (3, 1, 0, 1) dot (1, 2, 2, 3) = (3 + 2 + 0 + 3); where (3, 1, 0, 1) = row 4 of triangle A026794, the partition triangle and (1, 2, 2, 3) = the first 4 terms of A000005, d(n).

CROSSREFS

Cf. A000005, A026794, A137639.

Sequence in context: A243985 A200727 A096185 * A165362 A245282 A320355

Adjacent sequences: A137637 A137638 A137639 * A137641 A137642 A137643

KEYWORD

nonn

AUTHOR

Gary W. Adamson, Jan 31 2008

STATUS

approved