A100738 Inverse modulo 2 binomial transform of 5^n.

1, 4, 24, 96, 624, 2496, 14976, 59904, 390624, 1562496, 9374976, 37499904, 243749376, 974997504, 5849985024, 23399940096, 152587890624, 610351562496, 3662109374976, 14648437499904, 95214843749376, 380859374997504

Offset

0,2

Comments

5^n may be retrieved as sum{k=0..n, mod(binomial(n,k),2)A100738(k)}.

Links

Table of n, a(n) for n=0..21.

Formula

a(n)=sum{k=0..n, (-1)^A010060(n-k)*mod(binomial(n, k), 2)5^k}.

Crossrefs

Sequence in context: A319793 A091143 A119920 * A139238 A139231 A052462

Adjacent sequences: A100735 A100736 A100737 * A100739 A100740 A100741

Keyword

easy,nonn

Author

Paul Barry, Dec 06 2004

Status

approved