
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 11, 13, 15, 14, 16, 18, 17, 19, 20, 22, 24, 21, 23, 25, 27, 29, 26, 28, 30, 32, 31, 34, 36, 33, 35, 38, 37, 39, 40, 42, 45, 44, 43, 41, 46, 47, 48, 49, 50, 52, 55, 53, 51, 57, 59, 54, 56, 58, 60, 62, 64, 66, 67, 61, 63, 65
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OFFSET

1,2


LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..10000
Index entries for sequences that are permutations of the natural numbers


EXAMPLE

A287928(11) = 12, hence a(12) = 11.
A287928(12) = 11, hence a(11) = 12.
A287928(14) = 15, hence a(15) = 14.
A287928(15) = 14, hence a(14) = 15.
A287928(17) = 18, hence a(18) = 17.
A287928(18) = 17, hence a(17) = 18.
A287928(21) = 23, hence a(23) = 21.
A287928(22) = 21, hence a(21) = 22.
A287928(23) = 24, hence a(24) = 23.
A287928(24) = 22, hence a(22) = 24.


CROSSREFS

Cf. A287928.
Sequence in context: A187769 A209862 A209861 * A287928 A085516 A276444
Adjacent sequences: A287926 A287927 A287928 * A287930 A287931 A287932


KEYWORD

nonn,base


AUTHOR

Rémy Sigrist, Jun 03 2017


STATUS

approved

