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A376676
a(n) is the unique k such that the run lengths transform of A376637(n) equals A376637(k).
4
1, 1, 2, 3, 3, 2, 5, 4, 4, 5, 9, 6, 7, 7, 6, 9, 10, 11, 8, 13, 13, 8, 11, 10, 15, 12, 12, 15, 14, 21, 16, 17, 19, 18, 18, 19, 17, 16, 21, 14, 23, 22, 24, 20, 20, 24, 22, 23, 27, 28, 25, 26, 26, 25, 28, 27, 38, 30, 29, 34, 33, 32, 32, 33, 34, 29, 30, 38, 37, 36
OFFSET
1,3
COMMENTS
Every positive integer appears twice in this sequence.
LINKS
Rémy Sigrist, PARI program
FORMULA
A376637(a(n)) = A351653(A376637(n)).
EXAMPLE
The first terms, alongside the corresponding terms of A376637, are:
n a(n) A376637(n) A376637(a(n))
-- ---- ---------- -------------
1 1 1 1
2 1 2 1
3 2 11 2
4 3 12 11
5 3 21 11
6 2 22 2
7 5 112 21
8 4 122 12
9 4 211 12
10 5 221 21
11 9 1121 211
12 6 1122 22
13 7 1211 112
14 7 2122 112
15 6 2211 22
16 9 2212 211
PROG
(PARI) \\ See Links section.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Rémy Sigrist, Oct 01 2024
STATUS
approved