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.

A089947 G.f.: (1-x)^9/((1-5*x+6*x^2-4*x^3+x^4)*(-1+4*x-3*x^2+x^3)*(1-3*x+x^2)*(-1+2*x)).

Table of values

n a(n)
0 1
1 5
2 25
3 115
4 500
5 2092
6 8512
7 33910
8 132892
9 514079
10 1968021
11 7470434
12 28160354
13 105542777
14 393672627
15 1462503264
16 5414896000
17 19991387639
18 73628208598
19 270614786791
20 992880076249
21 3637400475618
22 13308475404934
23 48639360355243
24 177597694845849

List of values

[1, 5, 25, 115, 500, 2092, 8512, 33910, 132892, 514079, 1968021, 7470434, 28160354, 105542777, 393672627, 1462503264, 5414896000, 19991387639, 73628208598, 270614786791, 992880076249, 3637400475618, 13308475404934, 48639360355243, 177597694845849]

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

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