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A304647
Smallest term of A304636 that requires exactly n iterations to reach a fixed point under the x -> A181819(x) map.
3
5, 8, 30, 360, 1801800, 2746644314348614680000, 13268350773236509446586539974366689358164301703214270074935844483572035447570761114173070859428708074413696096366645684575600000000
OFFSET
0,1
COMMENTS
The first entry 5 is optional so has offset 0.
EXAMPLE
The list of multisets with Heinz numbers in the sequence is the following. The number of k's in row n + 1 is equal to the k-th largest term of row n.
5: {3}
8: {1,1,1}
30: {1,2,3}
360: {1,1,1,2,2,3}
1801800: {1,1,1,2,2,3,3,4,5,6}
2746644314348614680000: {1,1,1,1,1,1,2,2,2,2,2,3,3,3,3,4,4,4,5,5,5,6,6,7,7,8,9,10}
MATHEMATICA
Function[m, Times@@Prime/@m]/@NestList[Join@@Table[Table[i, {Reverse[#][[i]]}], {i, Length[#]}]&, {3}, 6]
KEYWORD
nonn
AUTHOR
Gus Wiseman, May 15 2018
STATUS
approved