A160820 a(1)=2. For n >=2, a(n) = smallest positive integer > a(n-1) such that Omega(a(n)) = Omega(a(n)-a(n-1)), where Omega(m) = A001222(m).

2, 5, 7, 21, 23, 33, 39, 41, 43, 49, 55, 63, 69, 71, 73, 77, 79, 85, 91, 95, 97, 105, 107, 109, 115, 119, 123, 129, 131, 141, 145, 153, 159, 169, 178, 181, 185, 194, 197, 199, 203, 209, 211, 215, 219, 231, 233, 237, 239, 241, 247, 253, 259, 265, 273, 285, 289

Offset

1,1

Comments

For n>=2, a(n)-a(n-1) = A160819(n).

Links

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

Crossrefs

Cf. A001222, A160819, A160822.

Sequence in context: A355597 A309542 A327322 * A158357 A072953 A243394

Adjacent sequences: A160817 A160818 A160819 * A160821 A160822 A160823

Keyword

nonn

Author

Leroy Quet, May 27 2009

Extensions

Extended by Ray Chandler, Jun 15 2009

Status

approved