A249506 Inverse permutation to A249494 (= permutation of the positive integers such that the parity of the first digit of a(n+1) equals that of a(n)'s last digit).

1, 7, 2, 8, 3, 9, 4, 10, 5, 6, 13, 14, 17, 18, 21, 22, 25, 26, 29, 11, 12, 15, 16, 19, 20, 23, 24, 27, 28, 30, 33, 34, 37, 38, 41, 42, 45, 46, 49, 31, 32, 35, 36, 39, 40, 43, 44, 47, 48, 50, 53, 54, 57, 58, 61, 62, 65, 66, 69, 51, 52, 55, 56, 59, 60, 63, 64, 67, 68, 70, 73, 74, 77, 78, 81, 82, 85

Offset

1,2

Comments

See A249278 and A249279 for the variant based on nonnegative integers; A162501 is a variant based not on parity but on equality.

Links

Table of n, a(n) for n=1..77.

Index entries for sequences that are permutations of the natural numbers

Prog

(PARI) a=vector(#A249494); for(i=1, #a, A249494[i]<=#a&&a[A249494[i]]=i); a \\ Result only valid up to the first zero.

Crossrefs

Cf. A000030, A162501.

Sequence in context: A348362 A201322 A093753 * A379648 A199046 A198564

Adjacent sequences: A249503 A249504 A249505 * A249507 A249508 A249509

Keyword

nonn

Author

M. F. Hasler, Oct 30 2014

Status

approved