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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.

A153757 a(n) = Sum_{k=1..n} A003266(k).

Table of values

n a(n)
1 1
2 2
3 4
4 10
5 40
6 280
7 3400
8 68920
9 2296600
10 124819000
11 11029312600
12 1581276391000
13 367448845658200
14 138299522459392600
15 84276864426837376600
16 83129040425047907584600
17 132705616446736897029760600
18 342829213074356555028732544600

List of values

[1, 2, 4, 10, 40, 280, 3400, 68920, 2296600, 124819000, 11029312600, 1581276391000, 367448845658200, 138299522459392600, 84276864426837376600, 83129040425047907584600, 132705616446736897029760600, 342829213074356555028732544600]

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

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