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.

A266820 Expansion of Product_{k>=1} ((1 + 2*x^k) * (1 + 3*x^k)).

Table of values

n a(n)
0 1
1 5
2 11
3 30
4 66
5 115
6 252
7 445
8 762
9 1350
10 2238
11 3690
12 5909
13 9480
14 14460
15 22475
16 34326
17 51150
18 76398
19 111810
20 163350
21 236610
22 339667
23 482040
24 684060
25 960780
26 1340953
27 1863570
28 2573022
29 3533310
30 4830822
31 6580170
32 8900382
33 12011430
34 16125198
35 21567965

List of values

[1, 5, 11, 30, 66, 115, 252, 445, 762, 1350, 2238, 3690, 5909, 9480, 14460, 22475, 34326, 51150, 76398, 111810, 163350, 236610, 339667, 482040, 684060, 960780, 1340953, 1863570, 2573022, 3533310, 4830822, 6580170, 8900382, 12011430, 16125198, 21567965]