A090469 Least (distinct) composite k such that k+n, k+2n, k+3n, ... up to n terms are all composite.

8, 4, 6, 10, 15, 9, 14, 12, 18, 16, 22, 20, 26, 21, 24, 28, 34, 27, 38, 25, 30, 32, 46, 33, 35, 36, 39, 40, 58, 42, 62, 44, 45, 48, 49, 50, 74, 52, 51, 54, 82, 56, 86, 55, 57, 60, 94, 63, 70, 64, 66, 65, 106, 68, 75, 72, 69, 76, 118, 78, 122, 80, 77, 84, 85, 81, 134, 88, 87, 90

Offset

1,1

Comments

Conjectures: 1. For n > 1, a(n) is the least composite k not already used such that gcd(n, k) > 1. 2. For any prime p > 5, a(p) = 2p. - David Wasserman, Nov 08 2005

Links

Table of n, a(n) for n=1..70.

Crossrefs

Sequence in context: A199434 A253073 A090325 * A322743 A168546 A195346

Adjacent sequences: A090466 A090467 A090468 * A090470 A090471 A090472

Keyword

nonn

Author

Amarnath Murthy, Dec 02 2003

Extensions

More terms from David Wasserman, Nov 08 2005

Status

approved