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A316428 Heinz numbers of integer partitions such that every part is divisible by the number of parts. 26
1, 2, 3, 5, 7, 9, 11, 13, 17, 19, 21, 23, 29, 31, 37, 39, 41, 43, 47, 49, 53, 57, 59, 61, 67, 71, 73, 79, 83, 87, 89, 91, 97, 101, 103, 107, 109, 111, 113, 125, 127, 129, 131, 133, 137, 139, 149, 151, 157, 159, 163, 167, 169, 173, 179, 181, 183, 191, 193, 197 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
The Heinz number of an integer partition (y_1,...,y_k) is prime(y_1)*...*prime(y_k).
LINKS
EXAMPLE
93499 is the Heinz number of (12,8,8,4) and belongs to the sequence because each part is divisible by 4.
Sequence of partitions such that every part is divisible by the number of parts begins (1), (2), (3), (4), (2,2), (5), (6), (7), (8), (4,2), (9).
MATHEMATICA
Select[Range[200], And@@Cases[If[#==1, {}, FactorInteger[#]], {p_, k_}:>Divisible[PrimePi[p], PrimeOmega[#]]]&]
CROSSREFS
Sequence in context: A337694 A305103 A065520 * A277702 A279516 A329559
KEYWORD
nonn
AUTHOR
Gus Wiseman, Jul 02 2018
STATUS
approved

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Last modified April 21 14:03 EDT 2024. Contains 371870 sequences. (Running on oeis4.)