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.

A361291 a(n) = ((2*n + 1)^n - 1)/(2*n).

Table of values

n a(n)
1 1
2 6
3 57
4 820
5 16105
6 402234
7 12204241
8 435984840
9 17927094321
10 833994048910
11 43309534450633
12 2483526865641276
13 155867505885345241
14 10627079738421409410
15 782175399728156197665
16 61812037545704964935440
17 5220088150634922700769761
18 469168161404536131943150998

List of values

[1, 6, 57, 820, 16105, 402234, 12204241, 435984840, 17927094321, 833994048910, 43309534450633, 2483526865641276, 155867505885345241, 10627079738421409410, 782175399728156197665, 61812037545704964935440, 5220088150634922700769761, 469168161404536131943150998]