A376685 a(n) is the unique k such that A376637(k) is the reversal of A376637(n).
1, 2, 3, 5, 4, 6, 9, 10, 7, 8, 13, 15, 11, 16, 12, 14, 19, 21, 17, 23, 18, 24, 20, 22, 27, 28, 25, 26, 38, 34, 40, 33, 32, 30, 39, 37, 36, 29, 35, 31, 44, 43, 42, 41, 48, 47, 46, 45, 54, 53, 56, 55, 50, 49, 52, 51, 59, 60, 57, 58, 62, 61, 64, 63, 67, 68, 65
Offset: 1
Examples
The first terms, alongside the corresponding terms of A376637, are: n a(n) A376637(n) A376637(a(n)) -- ---- ---------- ------------- 1 1 1 1 2 2 2 2 3 3 11 11 4 5 12 21 5 4 21 12 6 6 22 22 7 9 112 211 8 10 122 221 9 7 211 112 10 8 221 122 11 13 1121 1211 12 15 1122 2211 13 11 1211 1121 14 16 2122 2212 15 12 2211 1122 16 14 2212 2122
Links
- Rémy Sigrist, Table of n, a(n) for n = 1..10048
- Rémy Sigrist, PARI program
- Index entries for sequences that are permutations of the natural numbers
Programs
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PARI
\\ See Links section.
Comments