A096076 Not the sum of two relatively prime composite numbers.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 18, 20, 21, 22, 24, 26, 27, 28, 30, 32, 36, 38, 40, 42, 45, 48, 50, 54, 56, 60, 66, 70, 72, 78, 80, 84, 90, 96, 105, 108, 110, 120, 126, 132, 138, 140, 150, 180, 210

Offset

0,2

Comments

Max Alekseyev showed that this sequence is finite; proof completed by several people to show that the list is complete.

Links

Table of n, a(n) for n=0..53.

Example

13 is not in the set because 13 = 4 + 9. 15 = 6 + 9 does not prevent 15 from being in the set because gcd(6,9) = 3.

Crossrefs

Sequence in context: A140332 A368955 A155182 * A108864 A334140 A338883

Adjacent sequences: A096073 A096074 A096075 * A096077 A096078 A096079

Keyword

nonn,fini,full

Author

Franklin T. Adams-Watters, Jul 22 2004

Status

approved