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A035140 Digits of juxtaposition of prime factors of n appear also in n. 4
25, 32, 121, 125, 128, 132, 135, 143, 175, 187, 243, 250, 256, 295, 312, 324, 341, 351, 375, 432, 451, 512, 625, 671, 679, 735, 781, 875, 928, 932, 1023, 1024, 1053, 1057, 1207, 1243, 1250, 1255, 1324, 1325, 1328, 1331, 1352, 1359, 1372, 1375, 1377, 1379 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..48.

EXAMPLE

295 = 5 * 59 since {5,9} subset of {2,5,9}.

MATHEMATICA

id[n_]:=Complement[Range[0, 9], IntegerDigits[n]]; fac[n_]:=Flatten[IntegerDigits[Take[FactorInteger[n], All, 1]]; t={}; Do[If[!PrimeQ[n] && Intersection[id[n], fac[n]] == {}, AppendTo[t, n]], {n, 2, 1380}]; t (* Jayanta Basu, May 01 2013 *)

CROSSREFS

Cf. A035139, A035141.

Sequence in context: A258876 A263029 A225418 * A050694 A107608 A219951

Adjacent sequences:  A035137 A035138 A035139 * A035141 A035142 A035143

KEYWORD

nonn,base,changed

AUTHOR

Patrick De Geest, Nov 15 1998

STATUS

approved

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Last modified October 14 08:54 EDT 2019. Contains 327995 sequences. (Running on oeis4.)