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A136611 (0, 1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3, ...) becomes (0, 1, 2, 3, 4^5, 6, 7*8, 9, 10^11, 12^13, 14*15, 16, 17^18*19, ...). 2
0, 1, 2, 3, 1024, 6, 56, 9, 100000000000, 106993205379072, 210, 16, 267198604589286774829171, 20, 462, 552, 2220446049250313080847263336181640625, 27 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
a(36) has 8261 decimal digits.
LINKS
Michael De Vlieger, Table of n, a(n) for n = 0..35
EXAMPLE
a(4) = 4^5 = 1024,
a(6) = 7*8 = 56,
a(8) = 10^11 = 100000000000,
a(9) = 12^13 = 19216339899072,
a(10) = 14*15 = 210,
a(12) = 17^18*19 = 266314164608823014829171,
etc.
MATHEMATICA
j = k = 0; f[n_] := Flatten@ Riffle[Map[If[#2 == 1, {}, {"~Power~"}] & @@ # &, FactorInteger[n]], "~Times~"]; Array[(j = k; k += #2 + 1; ToExpression@ Apply[StringJoin, Riffle[Map[ToString, j + Range[0, #2]], #1]]) & @@ {#, Length[#]} &@ f[#] &, 22, 0] (* Michael De Vlieger, Oct 24 2022 *)
CROSSREFS
Sequence in context: A066685 A076155 A352537 * A004898 A062920 A228127
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(9) and a(12) corrected and 2 terms appended by R. J. Mathar, Apr 14 2010
Offset 0 from Michael De Vlieger, Oct 24 2022
STATUS
approved

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Last modified March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)