A175231 Each term of the sequence is the smallest positive integer that is coprime to all earlier terms and that has a different prime signature than all earlier terms. (a(1)=1.)

1, 2, 9, 35, 1331, 2873, 12673, 923521, 2076773, 4084441, 10109591, 27433619, 3939040643, 6085997377, 10930463309, 15088854631, 37920198353, 68248399103, 152574439967, 48551226272641, 52753681286021, 69819577467721

Offset

1,2

Links

Table of n, a(n) for n=1..22.

Example

The factorization of the first 5 terms: 1^0, 2^1, 3^2, 5^1*7^1, 11^3.

Crossrefs

Sequence in context: A185234 A357202 A306791 * A175261 A086556 A319012

Adjacent sequences: A175228 A175229 A175230 * A175232 A175233 A175234

Keyword

nonn

Author

Leroy Quet, Mar 07 2010

Extensions

Extended by Ray Chandler, Mar 13 2010

Status

approved