A171559 Powers of 2 (cf. A000079) with 1 replaced by 3.

3, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, 67108864, 134217728, 268435456, 536870912, 1073741824, 2147483648, 4294967296, 8589934592

Offset

0,1

Comments

First differences of A171449.

Links

Table of n, a(n) for n=0..33.

Index entries for linear recurrences with constant coefficients, signature (2).

Formula

a(n+1)-a(n) = A171449(n).

a(n) + A171449(n) = A000079(n+1) = 2*A000079(n).

G.f.: (3-4*x)/(1-2*x).

Crossrefs

Sequence in context: A072798 A075087 A084657 * A300883 A019916 A201838

Adjacent sequences: A171556 A171557 A171558 * A171560 A171561 A171562

Keyword

nonn,less

Author

Paul Curtz, Dec 11 2009

Extensions

Edited by R. J. Mathar and N. J. A. Sloane, Dec 15 2009

Status

approved