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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; text; 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.

LINKS

Table of n, a(n) for n=1..41.

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, Aug 17 2009

STATUS

approved

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Last modified August 20 18:28 EDT 2014. Contains 245801 sequences.