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A328403
a(n) = A276086(A276086(A276086(n))), where A276086(n) converts primorial base expansion of n into its prime product form.
9
3, 6, 5, 18, 7, 43218, 125, 1050, 16807, 10, 161051, 1320550, 7105308412125, 7357350, 265837, 835182761270, 2292646180979, 146410, 258413198822535882125, 107718961350, 1045726245479028578048875581177070937, 32310040537956402036523898190, 528950766088569054716797662440479
OFFSET
0,1
FORMULA
A051903(a(n)) = A328394(n).
A061395(a(n)) = A328405(n).
A328114(a(n)) = A328398(n).
A235224(a(n)) = A328406(n).
MATHEMATICA
Block[{b = MixedRadix[Reverse@ Prime@ Range@ 120], f}, f[n_] := Times @@ Power @@@ # &@ Transpose@ {Prime@ Range@ Length@ #, Reverse@ #} &@ IntegerDigits[n, b]; Array[Nest[f, #, 3] &, 23, 0]] (* Michael De Vlieger, Oct 17 2019 *)
PROG
(PARI)
A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
KEYWORD
nonn
AUTHOR
Antti Karttunen, Oct 15 2019
STATUS
approved