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.

A244653 G.f. A(x) satisfies: Sum_{k=0..n} [x^k] A(x)^n = binomial(7*n,2*n).

Table of values

n a(n)
0 1
1 20
2 280
3 3521
4 42945
5 521913
6 6379233
7 78640740
8 978172724
9 12270946072
10 155139813381
11 1975245161155
12 25308115539770
13 326106155857041
14 4223481710794292
15 54951230993010196
16 717942326681863941
17 9415448193554916520
18 123904268078599269723
19 1635676807214777434793

List of values

[1, 20, 280, 3521, 42945, 521913, 6379233, 78640740, 978172724, 12270946072, 155139813381, 1975245161155, 25308115539770, 326106155857041, 4223481710794292, 54951230993010196, 717942326681863941, 9415448193554916520, 123904268078599269723, 1635676807214777434793]