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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.

A271469 G.f. satisfies A(x) = 1 + x*(A(x)^3 - A(x)^4 + A(x)^5).

Table of values

n a(n)
0 1
1 1
2 4
3 23
4 155
5 1142
6 8910
7 72350
8 605056
9 5175866
10 45077560
11 398348733
12 3562916317
13 32192775763
14 293410452560
15 2694283228653
16 24902681767987
17 231496130358758
18 2162985033344112
19 20301976721356134
20 191336242071696514
21 1809916398759630481
22 17178063381786563194
23 163536967014934201972
24 1561247114394683682834
25 14943175106109268856975

List of values

[1, 1, 4, 23, 155, 1142, 8910, 72350, 605056, 5175866, 45077560, 398348733, 3562916317, 32192775763, 293410452560, 2694283228653, 24902681767987, 231496130358758, 2162985033344112, 20301976721356134, 191336242071696514, 1809916398759630481, 17178063381786563194, 163536967014934201972, 1561247114394683682834, 14943175106109268856975]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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