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A179122
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a(1) = 8, a(n) = concatenation of the prime divisors, ordered descending by their size, of a(n - 1)
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0
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8, 222, 3732, 311322, 89531132, 2238278322, 123077433732, 124155175111322, 26516317994713012, 1712365225813871322, 28539420430231188732, 2378285035852599061322, 14894019245254379840272
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(1) = 8 = 2 . 2 . 2, so a(2) = 222. 222 = 37 . 3 . 2, so a(3) = 3732.
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MATHEMATICA
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nxt[n_]:=FromDigits[Flatten[IntegerDigits/@Reverse[Table[#[[1]], {#[[2]]}]&/@ FactorInteger[n]]]]; NestList[nxt, 8, 15] (* Harvey P. Dale, Feb 04 2015 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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