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.

A246543 a(n) = (2/n^3)*( Sum_{k=0..n-1} (-1)^k*(3*k^2+3*k+1)*binomial(n-1,k)^3*binomial(n+k,k)^3 ).

Table of values

n a(n)
1 2
2 -47
3 1142
4 3793
5 -4094806
6 371557891
7 -13021558306
8 -1374157073639
9 281067953420114
10 -22220280272696387
11 -51611579093593498
12 257837341935815261683
13 -35155217354672369625958
14 1761633462267526777842223
15 202464167122130621896038062

List of values

[2, -47, 1142, 3793, -4094806, 371557891, -13021558306, -1374157073639, 281067953420114, -22220280272696387, -51611579093593498, 257837341935815261683, -35155217354672369625958, 1761633462267526777842223, 202464167122130621896038062]