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.

A143927 G.f. satisfies: A(x) = (1 + x*A(x) + x^2*A(x)^2)^2.

Table of values

n a(n)
0 1
1 2
2 7
3 28
4 123
5 572
6 2769
7 13806
8 70414
9 365636
10 1926505
11 10273870
12 55349155
13 300783420
14 1646828655
15 9075674700
16 50304255210
17 280248358964
18 1568399676946
19 8813424968192
20 49709017472751
21 281306750922072
22 1596802663432503

List of values

[1, 2, 7, 28, 123, 572, 2769, 13806, 70414, 365636, 1926505, 10273870, 55349155, 300783420, 1646828655, 9075674700, 50304255210, 280248358964, 1568399676946, 8813424968192, 49709017472751, 281306750922072, 1596802663432503]

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

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