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A115511
Inverse permutation to sequence A115510.
2
1, 3, 2, 5, 6, 4, 7, 9, 8, 10, 11, 12, 13, 14, 15, 17, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 64, 66, 67, 68, 69, 70, 71, 72
OFFSET
1,2
EXAMPLE
A115510(4) = 6, hence a(6) = 4; A115510(5) = 4, hence a(4) = 5; A115510(6) = 5, hence a(5) = 6.
CROSSREFS
Cf. A115510.
Sequence in context: A227192 A360260 A099889 * A303768 A182801 A026098
KEYWORD
easy,nonn
AUTHOR
Leroy Quet, Jan 23 2006
EXTENSIONS
Corrected and extended by Klaus Brockhaus, Jan 24 2006
STATUS
approved