OFFSET
0,1
COMMENTS
FORMULA
EXAMPLE
The strict integer partitions of 5 are {(5), (4,1), (3,2)}, with Heinz numbers {11,14,15}, with Heinz number prime(11)*prime(14)*prime(15) = 62651, so a(6) = 62651.
The sequence of terms together with their prime indices begins:
2: {1}
3: {2}
5: {3}
143: {5,6}
493: {7,10}
62651: {11,14,15}
26718511: {13,21,22,30}
22017033127: {17,26,33,35,42}
44220524211551: {19,34,39,55,66,70}
52289759420183033963: {23,38,51,65,77,78,105,110}
546407750301194131199484983: {29,46,57,85,91,102,130,154,165,210}
MATHEMATICA
Table[Times@@Prime/@(Times@@Prime/@#&/@Select[IntegerPartitions[n], UnsameQ@@#&]), {n, 7}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Gus Wiseman, May 07 2019
STATUS
approved