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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.

A371313 Expansion of e.g.f. Product_{k>=1} 1 / (1 - x^k/k)^2.

Table of values

n a(n)
0 1
1 2
2 8
3 40
4 254
5 1868
6 15996
7 153144
8 1637520
9 19191072
10 245463936
11 3390905472
12 50406479328
13 800678811840
14 13547088596544
15 242995426574976
16 4607744279916672
17 92046384885051648
18 1932579234508861440
19 42530614791735573504
20 979132781170084872960
21 23529915213836747927040

List of values

[1, 2, 8, 40, 254, 1868, 15996, 153144, 1637520, 19191072, 245463936, 3390905472, 50406479328, 800678811840, 13547088596544, 242995426574976, 4607744279916672, 92046384885051648, 1932579234508861440, 42530614791735573504, 979132781170084872960, 23529915213836747927040]

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

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