A160822 a(1)=2. For n >= 2, a(n) = smallest integer > a(n-1) such that omega(a(n)) = omega(a(n)-a(n-1)), where omega(m) = A001221(m).

2, 4, 7, 9, 11, 13, 16, 19, 23, 25, 27, 29, 31, 45, 47, 49, 53, 61, 64, 67, 71, 73, 81, 83, 93, 97, 101, 103, 107, 109, 113, 119, 121, 125, 127, 131, 139, 145, 149, 151, 161, 163, 167, 169, 173, 181, 187, 191, 193, 197, 199, 205, 215, 221, 223, 227, 229, 233, 241, 243

Offset

1,1

Comments

For n >=2, a(n)-a(n-1) = A160821(n).

Links

H. v. Eitzen, Table of n, a(n) for n=1,...,10000

Crossrefs

Cf. A001221, A160820, A160821.

Sequence in context: A284589 A020904 A043000 * A111495 A187686 A024812

Adjacent sequences: A160819 A160820 A160821 * A160823 A160824 A160825

Keyword

nonn

Author

Leroy Quet, May 27 2009

Extensions

Extended by Ray Chandler, Jun 15 2009

Status

approved