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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 Table of n, a(n) for n=0..6. 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 Cf. A001462, A014643, A014644, A055932, A056239, A112798, A130091, A181819, A181821, A182850-A182858, A296150, A275870, A304455, A304678. Sequence in context: A298149 A136242 A066732 * A265735 A038520 A294990 Adjacent sequences: A304676 A304677 A304678 * A304680 A304681 A304682 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.)