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A013624 Triangle of coefficients in expansion of (3+7x)^n. 0
1, 3, 7, 9, 42, 49, 27, 189, 441, 343, 81, 756, 2646, 4116, 2401, 243, 2835, 13230, 30870, 36015, 16807, 729, 10206, 59535, 185220, 324135, 302526, 117649, 2187, 35721, 250047, 972405, 2268945, 3176523, 2470629, 823543, 6561, 122472 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..37.

FORMULA

G.f.: 1 / [1 - x(3+7y)].

CROSSREFS

Sequence in context: A199190 A075982 A100839 * A053366 A128052 A033681

Adjacent sequences:  A013621 A013622 A013623 * A013625 A013626 A013627

KEYWORD

tabl,nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified March 31 15:40 EDT 2020. Contains 333151 sequences. (Running on oeis4.)