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 A003272 a(n) = ceiling((-4n)/Bernoulli(2n)). 1
 0, -24, 240, -504, 480, -264, 95, -24, 5, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 REFERENCES Douglas C. Ravenel, Complex cobordism theory for number theorists, Lecture Notes in Mathematics, 1326, Springer-Verlag, Berlin-New York, 1988, pp. 123-133. F. Hirzebruch et al., Manifolds and Modular Forms, Vieweg, 2nd ed. 1994, p. 130. LINKS G. C. Greubel, Table of n, a(n) for n = 0..1000 MATHEMATICA Table[Ceiling[(-4n)/BernoulliB[2n]], {n, 0, 75}] (* Alonso del Arte, Jul 19 2012 *) PROG (PARI) vector(75, n, n--; ceil(-4*n/bernfrac(2*n))) \\ G. C. Greubel, Jul 04 2019 (MAGMA) [Ceiling(-4*n/Bernoulli(2*n)): n in [0..75]]; // G. C. Greubel, Jul 04 2019 (Sage) [ceil(-4*n/bernoulli(2*n)) for n in (0..75)] # G. C. Greubel, Jul 04 2019 CROSSREFS Sequence in context: A081863 A247825 A003264 * A003245 A006863 A335128 Adjacent sequences:  A003269 A003270 A003271 * A003273 A003274 A003275 KEYWORD sign AUTHOR STATUS approved

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Last modified April 10 15:47 EDT 2021. Contains 342845 sequences. (Running on oeis4.)