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A069836
Inverse permutation to A057033: a(n) is the m such that A057033(m) = n, or 0 if no such m exists.
1
1, 4, 2, 13, 3, 7, 40, 22, 5, 10, 6, 12, 121, 31, 8, 67, 9, 16, 17, 364, 11, 19, 202, 37, 94, 49, 14, 24, 15, 25, 1093, 58, 112, 28, 18, 27, 52, 607, 20, 283, 21, 34, 32, 76, 23, 148, 62, 73, 157, 85, 26, 175, 38, 43, 3280, 337, 29, 46, 30, 42, 850, 103, 82, 45, 33, 1822
OFFSET
1,2
COMMENTS
Are there any 0's in this sequence? I have computed that the first 1000 terms are all positive, the largest of these being a(980) = 1328602.
EXAMPLE
a(4) = 13 because A057033(13) = 4.
PROG
(MATLAB) function n = back_cyclic(n) i = 1; while i < n i = i + 1; if mod(n, i) == 0 n = n + i - 1; else n = n - 1; end end
CROSSREFS
Cf. A057033.
Sequence in context: A105196 A372493 A167557 * A224820 A125153 A191451
KEYWORD
easy,nonn
AUTHOR
David Wasserman, Apr 23 2002
STATUS
approved