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1, followed by numerators of first differences of Bernoulli numbers (B(i) - B(i-1)).
4

%I #19 Jan 03 2022 21:09:58

%S 1,-3,2,-1,-1,1,1,-1,-1,1,5,-5,-691,691,7,-7,-3617,3617,43867,-43867,

%T -174611,174611,854513,-854513,-236364091,236364091,8553103,-8553103,

%U -23749461029,23749461029,8615841276005,-8615841276005,-7709321041217,7709321041217,2577687858367

%N 1, followed by numerators of first differences of Bernoulli numbers (B(i) - B(i-1)).

%e Bernoulli numbers: 1, -1/2, 1/6, 0, -1/30, 0, 1/42, 0, -1/30, 0, 5/66, ...

%e First differences: -3/2, 2/3, -1/6, -1/30, 1/30, 1/42, -1/42, -1/30, ...

%e Numerators: -3, 2, -1, -1, 1, 1, -1, -1, 1, 5, -5, -691, 691, 7, ...

%e Denominators: 2, 3, 6, 30, 30, 42, 42, 30, 30, 66, 66, 2730, ...

%Y Cf. A027641/A027642.

%Y For denominators see A051717.

%K sign

%O 0,2

%A _Paul Curtz_, Jan 25 2010

%E Edited and more terms from _N. J. A. Sloane_, Apr 22 2021