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.

A122939 G.f. A(x) satisfies: A(x+x^2) = A(x)^2/(1+x)^2.

Table of values

n a(n)
0 1
1 2
2 3
3 6
4 17
5 70
6 390
7 2776
8 24042
9 244864
10 2862185
11 37715474
12 552685976
13 8910951840
14 156709821779
15 2984589501562
16 61188398397436
17 1343410717573876
18 31445844702847347
19 781689483100388326
20 20564696601659697997

List of values

[1, 2, 3, 6, 17, 70, 390, 2776, 24042, 244864, 2862185, 37715474, 552685976, 8910951840, 156709821779, 2984589501562, 61188398397436, 1343410717573876, 31445844702847347, 781689483100388326, 20564696601659697997]

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

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