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.

A216681 G.f.: A(x) = 1 + x*A(x)^3 / ( A(I*x)*A(-I*x) ), where I^2 = -1.

Table of values

n a(n)
0 1
1 1
2 3
3 17
4 85
5 333
6 1883
7 13153
8 76329
9 363033
10 2304867
11 17067553
12 104686957
13 534812789
14 3558451915
15 27086552833
16 170930393745
17 906063493617
18 6183676880195
19 47831931663921
20 307091159448965
21 1664876216837789
22 11545009017568635
23 90248125157828449

List of values

[1, 1, 3, 17, 85, 333, 1883, 13153, 76329, 363033, 2304867, 17067553, 104686957, 534812789, 3558451915, 27086552833, 170930393745, 906063493617, 6183676880195, 47831931663921, 307091159448965, 1664876216837789, 11545009017568635, 90248125157828449]

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

Content is available under The OEIS End-User License Agreement.