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 A124507 a(n) = floor(exp(n*Pi/2)). 2
 1, 4, 23, 111, 535, 2575, 12391, 59609, 286751, 1379410, 6635623, 31920519, 153552935, 738662922, 3553321280, 17093171648, 82226315585, 395547831244, 1902773895292, 9153250784394, 44031505860632, 211812562992413, 1018919543279304, 4901489415968642 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 REFERENCES Roger Penrose, The Road to Reality, (2005), p. 88 (figure 5.3). LINKS G. C. Greubel, Table of n, a(n) for n = 0..1000 MAPLE Digits:= 2000: a:= n-> floor(exp(n*Pi/2)): seq(a(n), n=0..30); # Alois P. Heinz, Nov 25 2018 MATHEMATICA Table[ Floor@ Exp[n*Pi/2], {n, 0, 21}] (* Robert G. Wilson v, Dec 31 2006 *) PROG (PARI) vector(30, n, n--; floor(exp(n*Pi/2))) \\ G. C. Greubel, Nov 25 2018 (Magma) R:= RealField(10); [Floor(Exp(n*Pi(R)/2)): n in [0..30]]; // G. C. Greubel, Nov 25 2018 (Sage) [floor(exp(n*pi/2)) for n in range(30)] # G. C. Greubel, Nov 25 2018 CROSSREFS Cf. A062360 (even bisection), A042972. Sequence in context: A197868 A017973 A306669 * A239813 A174248 A353096 Adjacent sequences: A124504 A124505 A124506 * A124508 A124509 A124510 KEYWORD nonn AUTHOR Zacariaz Martinez, Dec 27 2006 EXTENSIONS Edited and extended by Robert G. Wilson v, Dec 31 2006 Comments edited by Jon E. Schoenfield, Nov 25 2018 STATUS approved

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Last modified November 28 08:48 EST 2022. Contains 358407 sequences. (Running on oeis4.)