1,1

Permutation of natural numbers.

Table of n, a(n) for n=1..69.

Index entries for sequences that are permutations of the natural numbers

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

Cf. A066248, A000040, A002808, A066251, A066253.

Sequence in context: A276505 A201901 A174239 * A065168 A318581 A065277

Adjacent sequences: A066246 A066247 A066248 * A066250 A066251 A066252

nonn

Reinhard Zumkeller, Dec 09 2001

approved