A251392 Indices of nonprimes in A098550.

1, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 24, 25, 26, 27, 28, 29, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 44, 45, 46, 47, 48, 49, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77

Offset

1,2

Comments

A010051(A098550(a(n))) = 0; A239968(A098550(a(n))) > 0;

three equivalent statements:

1) A098550 is a permutation of the positive integers, cf. A000027;

2) A251392 is a permutation of the nonprimes, cf. A018252;

3) A251392 is the complement of A251239.

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Prog

(Haskell)
a251392 n = a251392_list !! (n-1)
a251392_list = filter ((== 0) . a010051' . a098550) [1..]

Crossrefs

Cf. A098550, A018252, A010051, A239968, A251239, A251240 (subsequence).

Sequence in context: A288658 A065342 A231369 * A076597 A301592 A194414

Adjacent sequences: A251389 A251390 A251391 * A251393 A251394 A251395

Keyword

nonn

Author

Reinhard Zumkeller, Dec 03 2014

Status

approved