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.

A268300 G.f. satisfies: -1 = Product_{n>=1} (1-x^n) * (1 - x^n/A(x)) * (1 - x^(n-1)*A(x)), where g.f. A(x) = Sum_{n>=0} a(n)*2*(x/4)^n.

Table of values

n a(n)
0 1
1 7
2 119
3 2118
4 42523
5 914922
6 20745494
7 487390092
8 11764545555
9 289962708802
10 7267069560834
11 184626340341588
12 4744080078088734
13 123075608359376932
14 3219261610951795084
15 84806249132678044440
16 2248017950109054256899
17 59917503707743905031346
18 1604813748929693765997450
19 43170742498490205711682564
20 1165893490887496323343495146
21 31598783791475055433157814444
22 859179326846115018832395000820

List of values

[1, 7, 119, 2118, 42523, 914922, 20745494, 487390092, 11764545555, 289962708802, 7267069560834, 184626340341588, 4744080078088734, 123075608359376932, 3219261610951795084, 84806249132678044440, 2248017950109054256899, 59917503707743905031346, 1604813748929693765997450, 43170742498490205711682564, 1165893490887496323343495146, 31598783791475055433157814444, 859179326846115018832395000820]