A138966 a(n) = n + (smallest composite > n).

5, 6, 7, 10, 11, 14, 15, 17, 19, 22, 23, 26, 27, 29, 31, 34, 35, 38, 39, 41, 43, 46, 47, 49, 51, 53, 55, 58, 59, 62, 63, 65, 67, 69, 71, 74, 75, 77, 79, 82, 83, 86, 87, 89, 91, 94, 95, 97, 99, 101, 103, 106, 107, 109, 111, 113, 115, 118, 119, 122, 123, 125, 127, 129, 131

Offset

1,1

Comments

1 <= a(n+1) - a(n) <= 3.

Links

Table of n, a(n) for n=1..65.

Formula

a(n) = n + A113646(n+1). - Michel Marcus, Oct 13 2013

Example

a(1)=1+4, a(2)=2+4, a(3)=3+4, a(4)=4+6, a(5)=5+6, a(6)=6+8.

Crossrefs

Sequence in context: A123123 A308892 A092858 * A184804 A257604 A177089

Adjacent sequences: A138963 A138964 A138965 * A138967 A138968 A138969

Keyword

nonn

Author

Zak Seidov, Apr 04 2008

Status

approved