A157781 Numerator of Bernoulli(n, -1/2).

1, -1, 11, -3, 127, -5, 221, -7, 367, -9, -1895, -11, 1447237, -13, -57253, -15, 118526399, -17, -5749677193, -19, 91546283957, -21, -1792042789427, -23, 1982765468376757, -25, -286994504449237, -27, 3187598676787485443, -29, -4625594554880206360895, -31

Offset: 0

Author

N. J. A. Sloane, Nov 08 2009

Keywords

• sign
• frac

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..250

Crossrefs

For denominators see A157782.

Programs

Mathematica

Numerator[BernoulliB[Range[0,35],-(1/2)]] (* Harvey P. Dale, Aug 14 2011 *)