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A001527 a(n) = 2 * Sum_{i=0..n} C(2^n-1, i).
(Formerly M1286 N0493)
1
2, 4, 14, 128, 3882, 412736, 151223522, 189581406208, 820064805806914, 12419746847290729472, 668590083306794321516802, 129667782549203712117025325056, 91624448643446654575608517356620802, 238057970008583161105667221977375792447488 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
REFERENCES
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
R. O. Winder, Enumeration of seven-argument threshold functions, IEEE Trans. Electron. Computers, 14 (1965), 315-.
LINKS
MATHEMATICA
Table[2*Sum[Binomial[2^n - 1, i], {i, 0, n}], {n, 0, 15}] (* Harvey P. Dale, Mar 27 2011 *)
CROSSREFS
Equals 2 * A046855.
Sequence in context: A193520 A102897 A305856 * A067209 A134040 A368017
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)