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.

A309303 Expansion of g.f. (sqrt(x+1) - sqrt(1-3*x))/(2*(x+1)^(3/2)).

Table of values

n a(n)
0 0
1 1
2 -1
3 2
4 -1
5 4
6 2
7 13
8 23
9 68
10 164
11 439
12 1146
13 3067
14 8231
15 22306
16 60791
17 166684
18 459308
19 1271479
20 3534116
21 9859573
22 27598757
23 77490472
24 218183522
25 615902899
26 1742738477
27 4942022648
28 14043034703
29 39979680748
30 114020882010
31 325721340061

List of values

[0, 1, -1, 2, -1, 4, 2, 13, 23, 68, 164, 439, 1146, 3067, 8231, 22306, 60791, 166684, 459308, 1271479, 3534116, 9859573, 27598757, 77490472, 218183522, 615902899, 1742738477, 4942022648, 14043034703, 39979680748, 114020882010, 325721340061]