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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 T. D. Noe, Table of n, a(n) for n = 0..30 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 Adjacent sequences: A001524 A001525 A001526 * A001528 A001529 A001530 KEYWORD nonn,easy AUTHOR N. J. A. Sloane STATUS approved

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Last modified August 8 12:42 EDT 2024. Contains 375021 sequences. (Running on oeis4.)