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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.

A308463 a(n) = Sum_{k=1..n, gcd(n,k) = 1} Stirling2(n,k).

Table of values

n a(n)
1 1
2 1
3 4
4 7
5 51
6 16
7 876
8 2045
9 15475
10 15256
11 678569
12 2006863
13 27644436
14 46065293
15 669225640
16 5235101739
17 82864869803
18 234937438645
19 5832742205056
20 25117329128165
21 235703526149476
22 1886712616836675
23 44152005855084345
24 102153081219673712
25 3428690854204959151

List of values

[1, 1, 4, 7, 51, 16, 876, 2045, 15475, 15256, 678569, 2006863, 27644436, 46065293, 669225640, 5235101739, 82864869803, 234937438645, 5832742205056, 25117329128165, 235703526149476, 1886712616836675, 44152005855084345, 102153081219673712, 3428690854204959151]

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

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