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