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A141125
Hankel transform of a transform of Fibonacci numbers.
2
1, 4, -4, -16, 16, 64, -64, -256, 256, 1024, -1024, -4096, 4096, 16384, -16384, -65536, 65536, 262144, -262144, -1048576, 1048576, 4194304, -4194304, -16777216, 16777216, 67108864, -67108864, -268435456, 268435456
OFFSET
0,2
COMMENTS
Hankel transform of A100095(n+1).
FORMULA
G.f.: (1+4x)/(1+4x^2); a(n)=2^n*(cos(pi*n/2)+2*sin(pi*n/2)).
a(n+3) = a(n+2)*a(n+1)/a(n). [Reinhard Zumkeller, Mar 04 2011]
CROSSREFS
Cf. A141124.
Sequence in context: A218522 A303072 A231839 * A164111 A056450 A164906
KEYWORD
easy,sign
AUTHOR
Paul Barry, Jun 05 2008
STATUS
approved