A144761 Integers n such that Phi(2, a(n)) = A144741(a(n)) > Phi(2, k) for 0 < k < a(n).

4, 6, 10, 12, 18, 24, 30, 36, 42, 54, 60, 78, 84, 90, 120, 150, 168, 180, 210, 240, 270, 300, 330, 390, 420, 510, 546, 570, 630, 780, 840, 990, 1050, 1170, 1260, 1320, 1470, 1650, 1680, 1890, 2100, 2310, 2730, 3150, 3360, 3570, 3990, 4290, 4620, 4830

Offset

1,1

Comments

Subset of A065385.

The first three terms are semiprimes and the number of factors gradually increases. All except four and ten are multiples of six.

Links

Table of n, a(n) for n=1..50.

Crossrefs

Cf. A051953, A065385, A144741, A144742

Sequence in context: A024995 A343703 A086298 * A295523 A122171 A310580

Adjacent sequences: A144758 A144759 A144760 * A144762 A144763 A144764

Keyword

easy,nonn

Author

Reikku Kulon, Sep 20 2008

Status

approved