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A304679 A prime-multiplicity (or run-length) describing recurrence: a(n+1) = A181821(a(n)). 7
3, 4, 6, 18, 450, 205439850, 241382525361273331926149714645357743772646450 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
The first entry 3 is optional so has offset 0.
LINKS
EXAMPLE
The list of multisets with Heinz numbers in the sequence is A014643. The number of k's in row n + 1 is equal to the k-th term of row n. The length of row n is A014644(n).
3: {2}
4: {1,1}
6: {1,2}
18: {1,2,2}
450: {1,2,2,3,3}
205439850: {1,2,2,3,3,4,4,4,5,5,5}
MATHEMATICA
Function[m, Times@@Prime/@m]/@NestList[Join@@Table[Table[i, {#[[i]]}], {i, Length[#]}]&, {2}, 6]
CROSSREFS
Sequence in context: A298149 A136242 A066732 * A265735 A038520 A294990
KEYWORD
nonn
AUTHOR
Gus Wiseman, May 16 2018
STATUS
approved

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Last modified July 24 13:23 EDT 2024. Contains 374584 sequences. (Running on oeis4.)