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.

A271390 a(n) = (2*n + 1)^(2*floor((n-1)/2) + 1).

Table of values

n a(n)
0 1
1 3
2 5
3 343
4 729
5 161051
6 371293
7 170859375
8 410338673
9 322687697779
10 794280046581
11 952809757913927
12 2384185791015625
13 4052555153018976267
14 10260628712958602189
15 23465261991844685929951
16 59938945498865420543457
17 177482997121587371826171875
18 456487940826035155404146917

List of values

[1, 3, 5, 343, 729, 161051, 371293, 170859375, 410338673, 322687697779, 794280046581, 952809757913927, 2384185791015625, 4052555153018976267, 10260628712958602189, 23465261991844685929951, 59938945498865420543457, 177482997121587371826171875, 456487940826035155404146917]