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.

A300279 G.f.: Sum_{n>=0} (1 + x*(1+x)^n)^n / 2^(n+1).

Table of values

n a(n)
0 1
1 1
2 4
3 16
4 86
5 544
6 3904
7 31328
8 276798
9 2660564
10 27576614
11 306051500
12 3615559236
13 45241980928
14 597141146374
15 8283583741588
16 120393776421550
17 1828261719906800
18 28937578248560784
19 476355010859517352
20 8139464481630136242
21 144109168217154747856
22 2639508261422244889106
23 49940898467864797567140
24 974790619672853340925800

List of values

[1, 1, 4, 16, 86, 544, 3904, 31328, 276798, 2660564, 27576614, 306051500, 3615559236, 45241980928, 597141146374, 8283583741588, 120393776421550, 1828261719906800, 28937578248560784, 476355010859517352, 8139464481630136242, 144109168217154747856, 2639508261422244889106, 49940898467864797567140, 974790619672853340925800]