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A046511 Numbers with multiplicative persistence value 2. 4
25, 26, 27, 28, 29, 34, 35, 36, 37, 38, 43, 44, 45, 46, 48, 52, 53, 54, 56, 58, 62, 63, 64, 65, 67, 72, 73, 76, 82, 83, 84, 85, 92, 99, 125, 126, 127, 128, 129, 134, 135, 136, 137, 138, 143, 144, 145, 146, 148, 152, 153, 154, 156, 158, 162, 163, 164, 165, 167, 172 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..3000

Eric Weisstein's World of Mathematics, Multiplicative Persistence

EXAMPLE

129 -> [ 18 ] -> [ 8 ] = one digit in two steps.

MATHEMATICA

mpQ[n_]:=Length[NestWhileList[Times@@IntegerDigits[#]&, n, #>9&]]==3; Select[Range[200], mpQ] (* Harvey P. Dale, Apr 12 2014 *)

CROSSREFS

Cf. A003001, A014120, A046502.

Sequence in context: A165846 A135218 A133507 * A140058 A199992 A242221

Adjacent sequences:  A046508 A046509 A046510 * A046512 A046513 A046514

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Sep 15 1998

STATUS

approved

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Last modified August 14 17:44 EDT 2018. Contains 313751 sequences. (Running on oeis4.)