0,2

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

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

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.

Sequence in context: A051038 A140332 A155182 * A108864 A055722 A028830

Adjacent sequences: A096073 A096074 A096075 * A096077 A096078 A096079

nonn,fini,full

Franklin T. Adams-Watters, Jul 22 2004

approved