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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.

A193039 G.f. A(x) satisfies: 1 = Sum_{n>=0} x^n*A(-x)^A002024(n+1), where A002024 is defined as "n appears n times.".

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 5
5 13
6 34
7 91
8 251
9 709
10 2035
11 5913
12 17366
13 51483
14 153858
15 463001
16 1401751
17 4266619
18 13048709
19 40078032
20 123570957
21 382331356
22 1186699353
23 3694028136
24 11529606672
25 36073811897
26 113123222246
27 355485228001
28 1119275386080
29 3530531671842

List of values

[1, 1, 1, 2, 5, 13, 34, 91, 251, 709, 2035, 5913, 17366, 51483, 153858, 463001, 1401751, 4266619, 13048709, 40078032, 123570957, 382331356, 1186699353, 3694028136, 11529606672, 36073811897, 113123222246, 355485228001, 1119275386080, 3530531671842]

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

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