A304679 A prime-multiplicity (or run-length) describing recurrence: a(n+1) = A181821(a(n)).

3, 4, 6, 18, 450, 205439850, 241382525361273331926149714645357743772646450

Offset: 0

Author

Gus Wiseman, May 16 2018

Keywords

• nonn

Comments

The first entry 3 is optional so has offset 0.

Examples

			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}
		

Crossrefs

Cf. A001462, A014643, A014644, A055932, A056239, A112798, A130091, A181819, A181821, A182850-A182858, A296150, A275870, A304455, A304678.

Programs

Mathematica

Function[m,Times@@Prime/@m]/@NestList[Join@@Table[Table[i,{#[[i]]}],{i,Length[#]}]&,{2},6]