A003245 Nearest integer to -4n/Bernoulli(2n).

0, -24, 240, -504, 480, -264, 95, -24, 5, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset

0,2

References

F. Hirzebruch et al., Manifolds and Modular Forms, Vieweg, 2nd ed. 1994, p. 130.

Douglas C. Ravenel, Complex cobordism theory for number theorists, Lecture Notes in Mathematics, 1326, Springer-Verlag, Berlin-New York, 1988, pp. 123-133.

Links

Table of n, a(n) for n=0..75.

Index entries for sequences related to Bernoulli numbers.

Index entries for periodic sequences.

Index entries for linear recurrences with constant coefficients, signature (1).

Mathematica

Table[Round[(-4n)/BernoulliB[2n]], {n, 0, 75}] (* Alonso del Arte, Jul 19 2012 *)

Prog

(PARI) a(n)=if(n>9, 0, [0, -24, 240, -504, 480, -264, 95, -24, 5, -1][n+1]) \\ Charles R Greathouse IV, May 13 2026

Crossrefs

Cf. A000367/A002445.

Sequence in context: A247825 A003264 A003272 * A006863 A335128 A386225

Adjacent sequences: A003242 A003243 A003244 * A003246 A003247 A003248

Keyword

sign,easy

Author

N. J. A. Sloane

Status

approved