A162172 Absolute value of ( numerator + denominator of Bernoulli(2*n)).

2, 7, 29, 43, 29, 71, 2039, 13, 3107, 44665, 174281, 854651, 236361361, 8553109, 23749460159, 8615841290327, 7709321040707, 2577687858373, 26315271553051558183, 2929993913841565, 261082718496449108521, 1520097643918070804497, 27833269579301024234333

Offset

0,1

Links

Table of n, a(n) for n=0..22.

Formula

a(n)=|A000367(n)+A002445(n)|.

Example

a(0) = 2 = 1+1. a(1) = 7=1+6. a(2) =29 = -1+30.

Mathematica

Abs[Numerator[#]+Denominator[#]]&/@BernoulliB[2*Range[0, 30]] (* Harvey P. Dale, Jul 20 2024 *)

Crossrefs

Cf. A000367, A002445.

Sequence in context: A076043 A180448 A116968 * A274682 A359633 A339868

Adjacent sequences: A162169 A162170 A162171 * A162173 A162174 A162175

Keyword

nonn

Author

Juri-Stepan Gerasimov, Jun 27 2009

Extensions

Offset corrected, 3117 replaced by 3107, 2374494610159 by 23749460159 - R. J. Mathar, May 21 2010.

Status

approved