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.

A296516 a(n) is the number of terms in expanded form of bivariate polynomial Q_n, where (P_n, Q_n) is defined by: P_0 = x, Q_0 = y, P_(n+1) = P_n + Q_n, Q_(n+1) = P_n * Q_n.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 14
5 40
6 111
7 300
8 797
9 2098
10 5499
11 14389
12 37634
13 98435
14 257516
15 673827
16 1763460
17 4615686
18 12082137
19 31628294

List of values

[1, 1, 2, 5, 14, 40, 111, 300, 797, 2098, 5499, 14389, 37634, 98435, 257516, 673827, 1763460, 4615686, 12082137, 31628294]

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

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