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.

A193540 E.g.f.: Pi/(sqrt(2)*L) * (1 + 2*Sum_{n>=1} cos(2*Pi*n*x/L)/cosh(n*Pi)) where L = Lemniscate constant.

Table of values

n a(n)
0 1
1 -1
2 9
3 -153
4 4977
5 -261009
6 20039481
7 -2121958377
8 296297348193
9 -52750142341281
10 11662264481073129
11 -3134732109393169593
12 1006734732695870345937
13 -380718482718134681818929
14 167456229155543640166939161
15 -84761007600911799530893148937

List of values

[1, -1, 9, -153, 4977, -261009, 20039481, -2121958377, 296297348193, -52750142341281, 11662264481073129, -3134732109393169593, 1006734732695870345937, -380718482718134681818929, 167456229155543640166939161, -84761007600911799530893148937]