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A166452 Binomial transform of A166242 0
1, 3, 9, 21, 45, 99, 225, 507, 1101, 2295, 4653, 9381, 19221, 40491, 87453, 191205, 417117, 898119, 1897125, 3922977, 7945713, 15800367, 30960765, 60068235, 116058981, 224778159, 439342677, 871864317, 1764029985, 3643978479, 7672441101, 16397598555, 35377739037 (list; graph; refs; listen; history; text; internal format)
OFFSET

-1,2

LINKS

Table of n, a(n) for n=-1..31.

FORMULA

A007318 as an infinite lower triangular matrix * A166242 as a vector; where

A166242 = (1, 2, 4, 2, 4, 8, 4, 2,...)

EXAMPLE

a(2) = 21 = (1, 3, 3, 1) dot (1, 2, 4, 2) = (1 + 6 + 12 + 2).

CROSSREFS

A166242

Sequence in context: A110964 A107351 A068156 * A052101 A063830 A062444

Adjacent sequences:  A166449 A166450 A166451 * A166453 A166454 A166455

KEYWORD

nonn

AUTHOR

Gary W. Adamson, Oct 13 2009

STATUS

approved

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Last modified October 18 14:52 EDT 2019. Contains 328161 sequences. (Running on oeis4.)