A096015 a(n) = A096014(n) / 2.

1, 3, 3, 3, 5, 5, 7, 3, 3, 3, 11, 5, 13, 3, 3, 3, 17, 5, 19, 3, 3, 3, 23, 5, 5, 3, 3, 3, 29, 7, 31, 3, 3, 3, 5, 5, 37, 3, 3, 3, 41, 5, 43, 3, 3, 3, 47, 5, 7, 3, 3, 3, 53, 5, 5, 3, 3, 3, 59, 7, 61, 3, 3, 3, 5, 5, 67, 3, 3, 3, 71, 5, 73, 3, 3, 3, 7, 5, 79, 3, 3, 3, 83, 5, 5, 3, 3, 3, 89, 7, 7, 3, 3

Offset

1,2

Comments

For n > 1, a(n) is the larger of the least prime dividing n and the least prime not dividing n. - Peter Munn, Feb 21 2024

Links

Table of n, a(n) for n=1..93.

Formula

a(n) = if n is odd then A020639(n) else A053669(n).

Crossrefs

Cf. A020639, A053669, A096014.

Sequence in context: A130823 A101435 A077886 * A046702 A357057 A226592

Adjacent sequences: A096012 A096013 A096014 * A096016 A096017 A096018

Keyword

nonn,easy

Author

Reinhard Zumkeller, Jun 15 2004

Status

approved