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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.

A308476 a(1) = 1; a(n) = Sum_{k=1..n-1, gcd(n,k) = 1} Stirling2(n,k)*a(k).

Table of values

n a(n)
1 1
2 1
3 4
4 25
5 366
6 5491
7 176569
8 5332097
9 276268942
10 13470365431
11 1135683784753
12 75066413338423
13 9256260956838520
14 918768523598548169
15 140268128758724744770
16 18398287904991375995745
17 3879391299475140314514162
18 594721341754741064012714341

List of values

[1, 1, 4, 25, 366, 5491, 176569, 5332097, 276268942, 13470365431, 1135683784753, 75066413338423, 9256260956838520, 918768523598548169, 140268128758724744770, 18398287904991375995745, 3879391299475140314514162, 594721341754741064012714341]

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

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