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.

A069876 a(n) = (k-n+1)^n + (k-n+2)^n + ... + (k-1)^n + k^n, where k = n(n+1)/2.

Table of values

n a(n)
1 1
2 13
3 405
4 23058
5 2078375
6 271739011
7 48574262275
8 11373936899396
9 3377498614484589
10 1240006139651007925
11 551449374186192949841
12 292093390490112799117190
13 181694111127303339553250275
14 131144830297438122797495823519
15 108709456000518111261404495694375

List of values

[1, 13, 405, 23058, 2078375, 271739011, 48574262275, 11373936899396, 3377498614484589, 1240006139651007925, 551449374186192949841, 292093390490112799117190, 181694111127303339553250275, 131144830297438122797495823519, 108709456000518111261404495694375]