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.

A135071 a(n) = [x^(2^n+n-2)] (x + x^2 + x^4 + x^8 + ... + x^(2^n))^n /(n*(n-1)/2) for n>=2.

Table of values

n a(n)
2 1
3 1
4 3
5 7
6 40
7 236
8 1876
9 9948
10 147880
11 1453960
12 22015900
13 208197540
14 4313645260
15 50025596492
16 908013578304
17 10257540119128
18 410662921858728
19 7157148265575464
20 196798065310375948
21 3119117728942974484
22 117123479632632724204
23 2164788189493906776364
24 62917262965957689991564
25 1107373183582759036993164
26 59647207431378288643241916
27 1329593013280581859290571836
28 48482067282133360326936987936

List of values

[1, 1, 3, 7, 40, 236, 1876, 9948, 147880, 1453960, 22015900, 208197540, 4313645260, 50025596492, 908013578304, 10257540119128, 410662921858728, 7157148265575464, 196798065310375948, 3119117728942974484, 117123479632632724204, 2164788189493906776364, 62917262965957689991564, 1107373183582759036993164, 59647207431378288643241916, 1329593013280581859290571836, 48482067282133360326936987936]