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.

A135582 Expansion of 1/((1-x^2*c(x))(1-x-2x^2)) where c(x) is the g.f. of A000108.

Table of values

n a(n)
0 1
1 1
2 4
3 7
4 18
5 39
6 95
7 232
8 606
9 1663
10 4839
11 14807
12 47330
13 156611
14 532308
15 1846622
16 6507103
17 23210020
18 83590477
19 303425693
20 1108650850
21 4073443378
22 15039391464
23 55763147423
24 207543422052
25 775082175863
26 2903508757053
27 10907257755616

List of values

[1, 1, 4, 7, 18, 39, 95, 232, 606, 1663, 4839, 14807, 47330, 156611, 532308, 1846622, 6507103, 23210020, 83590477, 303425693, 1108650850, 4073443378, 15039391464, 55763147423, 207543422052, 775082175863, 2903508757053, 10907257755616]

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

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