

A003414


Floor( Bernoulli(2*n)/(4*n) ).


2



1, 0, 1, 0, 1, 0, 1, 0, 2, 13, 141, 1803, 27414, 487468, 10026348, 236192433, 6317862398, 190439655626, 6425425249653, 241207241774250, 10020155328258127, 458387180159766538, 22989944171828251746, 1259023596072554784854, 75008667460769643668558
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OFFSET

1,9


REFERENCES

F. Hirzebruch et al., Manifolds and Modular Forms, Vieweg, 2nd ed. 1994, p. 130.
D. C. Ravenel, Complex cobordism theory for number theorists, Lecture Notes in Mathematics, 1326, SpringerVerlag, BerlinNew York, 1988, pp. 123133.


LINKS

T. D. Noe, Table of n, a(n) for n = 1..100
Index entries for sequences related to Bernoulli numbers.


EXAMPLE

a(10) = 13 because the 20th (2 * 10) Bernoulli number is 174611/330, and that divided by (4) * 10 is approximately 13.2281.


MATHEMATICA

Table[Floor[BernoulliB[2n]/(4n)], {n, 24}] (* Alonso del Arte, Jul 11 2012 *)


CROSSREFS

Sequence in context: A132063 A318003 A143137 * A003326 A207493 A003581
Adjacent sequences: A003411 A003412 A003413 * A003415 A003416 A003417


KEYWORD

sign


AUTHOR

N. J. A. Sloane.


STATUS

approved



