cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A248656 E.g.f.: Sum_{n>=0} exp(n*(n+1)/2*x) / (1 + exp(n*x))^(n+1) = Sum_{n>=0} a(n) * x^(2*n) / (2*n)!.

Table of values

n a(n)
0 1
1 -4
2 1172
3 -2394604
4 17925470132
5 -356711164156204
6 15557257046545589492
7 -1306859934761006954164204
8 192757826813283097789632563252
9 -46564510721452609888686654192978604
10 17449940281041871638688960825766828695412
11 -9712709908164237387647891995373875626734039404

List of values

[1, -4, 1172, -2394604, 17925470132, -356711164156204, 15557257046545589492, -1306859934761006954164204, 192757826813283097789632563252, -46564510721452609888686654192978604, 17449940281041871638688960825766828695412, -9712709908164237387647891995373875626734039404]