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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.

A304371 Number of function calls of the second kind required to compute ack(3,n), where ack denotes the Ackermann function.

Table of values

n a(n)
0 5
1 47
2 257
3 1187
4 5093
5 21095
6 85865
7 346475
8 1391981
9 5580143
10 22345073
11 89429363
12 357815669
13 1431459191
14 5726229881
15 22905705851
16 91624396157
17 366500730239
18 1466009212289
19 5864049431939
20 23456222893445
21 93824941905287
22 375299868284297
23 1501199674463627

List of values

[5, 47, 257, 1187, 5093, 21095, 85865, 346475, 1391981, 5580143, 22345073, 89429363, 357815669, 1431459191, 5726229881, 22905705851, 91624396157, 366500730239, 1466009212289, 5864049431939, 23456222893445, 93824941905287, 375299868284297, 1501199674463627]

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

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