A066251 Inverse permutation to A066250.

1, 3, 2, 5, 4, 7, 6, 8, 10, 9, 12, 11, 16, 13, 18, 14, 22, 15, 28, 17, 30, 19, 36, 20, 40, 21, 42, 23, 46, 24, 52, 25, 58, 26, 60, 27, 66, 29, 70, 31, 72, 32, 78, 33, 82, 34, 88, 35, 96, 37, 100, 38, 102, 39, 106, 41, 108, 43, 112, 44, 126, 45, 130, 47, 136, 48, 138, 49, 148

Offset: 1

Author

Reinhard Zumkeller, Dec 09 2001

Keywords

• nonn

Comments

Permutation of natural numbers.

Links

• Index entries for sequences that are permutations of the natural numbers

Crossrefs

Cf. A066250, A000040, A002808, A066248, A066255.

Formula

a(n) = (if n is odd then A000040((n+1)/2) else A002808(n/2)) - 1.