cp's OEIS Frontend

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.

A233695 a(n) gives the position of -n in the sequence (or tree) S generated in order by these rules: 0 is in S; if x is in S then x + 1 is in S; if nonzero x is in S then 1/x is in S; if x is in S, then i*x is in S; where duplicates are deleted as they occur.

Table of values

n a(n)
1 10
2 18
3 30
4 56
5 109
6 219
7 450
8 933
9 1946
10 4071
11 8516
12 17823
13 37310
14 78112
15 163551
16 342461
17 717083
18 1501509
19 3144031
20 6583341
21 13784976

List of values

[10, 18, 30, 56, 109, 219, 450, 933, 1946, 4071, 8516, 17823, 37310, 78112, 163551, 342461, 717083, 1501509, 3144031, 6583341, 13784976]

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

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