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A357004
Smallest k for which the cyclic Haar graphs with indices k and n are isomorphic.
4
1, 2, 3, 4, 5, 5, 7, 8, 9, 10, 11, 9, 11, 11, 15, 16, 17, 17, 19, 17, 19, 19, 23, 17, 19, 19, 23, 19, 23, 23, 31, 32, 33, 34, 35, 36, 37, 37, 39, 34, 37, 42, 43, 37, 45, 43, 47, 33, 35, 37, 39, 37, 43, 45, 47, 35, 39, 43, 47, 39, 47, 47, 63, 64, 65, 65, 67, 65
OFFSET
1,2
COMMENTS
The fixed points are the terms of A137706.
The number of fixed points n in the interval 2^(m-1) <= n < 2^m equals A357000(m).
LINKS
Pontus von Brömssen, Table of n, a(n) for n = 1..10000
Eric Weisstein's World of Mathematics, Haar Graph
FORMULA
a(a(n)) = a(n).
a(n) = A357005(n) for n <= 146, but a(147) = 141 < 147 = A357005(147).
a(n) <= A357005(n) <= A163382(n).
CROSSREFS
Cf. A137706 (fixed points; or ordered list of distinct terms), A163382, A272919 (terms that occur only once), A357000, A357005.
Sequence in context: A131233 A136623 A031218 * A357005 A267508 A163382
KEYWORD
nonn
AUTHOR
STATUS
approved