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A164587 a(n) = 2*a(n - 2) for n > 2; a(1) = 1, a(2) = 8. 8
1, 8, 2, 16, 4, 32, 8, 64, 16, 128, 32, 256, 64, 512, 128, 1024, 256, 2048, 512, 4096, 1024, 8192, 2048, 16384, 4096, 32768, 8192, 65536, 16384, 131072, 32768, 262144, 65536, 524288, 131072, 1048576, 262144, 2097152, 524288, 4194304, 1048576 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

Interleaving of A000079 and A000079 without initial terms 1, 2, 4.

Binomial transform is A048696. Second binomial transform is A164298.

FORMULA

a(n) = (5+3*(-1)^n)*2^(1/4*(2*n-5+(-1)^n)).

G.f.: x*(1+8*x)/(1-2*x^2).

PROG

(MAGMA) [ n le 2 select 7*n-6 else 2*Self(n-2): n in [1..41] ];

CROSSREFS

Equals A112032 without initial term 4.

Cf. A000079 (powers of 2), A048696, A164298.

Sequence in context: A167623 A040063 A196170 * A050096 A161593 A008866

Adjacent sequences:  A164584 A164585 A164586 * A164588 A164589 A164590

KEYWORD

nonn

AUTHOR

Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Aug 17 2009

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Last modified February 15 08:44 EST 2012. Contains 205735 sequences.