A318718 Heinz numbers of strict integer partitions with a common divisor > 1.

3, 5, 7, 11, 13, 17, 19, 21, 23, 29, 31, 37, 39, 41, 43, 47, 53, 57, 59, 61, 65, 67, 71, 73, 79, 83, 87, 89, 91, 97, 101, 103, 107, 109, 111, 113, 115, 127, 129, 131, 133, 137, 139, 149, 151, 157, 159, 163, 167, 173, 179, 181, 183, 185, 191, 193, 197, 199

Offset

1,1

Comments

The Heinz number of an integer partition (y_1, ..., y_k) is prime(y_1) * ... * prime(y_k).

Links

Table of n, a(n) for n=1..58.

Mathematica

Select[Range[200], And[SquareFreeQ[#], GCD@@PrimePi/@FactorInteger[#][[All, 1]]>1]&]

Crossrefs

Cf. A000009, A000837, A051424, A078374, A289509, A302696, A302796, A302797, A303280, A305713.

Sequence in context: A339907 A255602 A319181 * A118749 A367227 A355821

Adjacent sequences: A318715 A318716 A318717 * A318719 A318720 A318721

Keyword

nonn

Author

Gus Wiseman, Sep 02 2018

Status

approved