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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.

A290183 a(n) is least p to label a node of height n in the rooted tree which has the primes (A000040) as labels for its nonroot nodes, and the parent of the node labeled p is the node labeled with the greatest prime less than p/2 (or the root if there is no such node).

Table of values

n a(n)
0 59
1 331
2 163
3 79
4 37
5 17
6 724777
7 941593
8 3578683
9 73397147
10 52457707
11 26228849
12 2600553509
13 1300276753

List of values

[59, 331, 163, 79, 37, 17, 724777, 941593, 3578683, 73397147, 52457707, 26228849, 2600553509, 1300276753]

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

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