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 A063132 Composite numbers not divisible by 2 or 3 which in base 3 contain their largest proper factor as a substring. 1
 49, 427, 671, 949, 1387, 1679, 1849, 2117, 3397, 3829, 4307, 6017, 6169, 7141, 8299, 10547, 11773, 13703, 17161, 17819, 19517, 24523, 25019, 25877, 29941, 30607, 31459, 33853, 34447, 34547, 35657, 35947, 38243, 38491, 38579, 39283, 45571 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA Do[ If[ !PrimeQ[ n ] && Mod[ n, 3 ] != 0 && StringPosition[ ToString[ FromDigits[ IntegerDigits[ n, 3 ] ] ], ToString[ FromDigits[ IntegerDigits[ Divisors[ n ][ [ -2 ] ], 3 ] ] ] ] != {}, Print[ n ] ], {n, 3, 10^5, 2} ] CROSSREFS Cf. A063127, A062238. Sequence in context: A168572 A350382 A063874 * A250081 A250082 A012097 Adjacent sequences:  A063129 A063130 A063131 * A063133 A063134 A063135 KEYWORD base,nonn AUTHOR Robert G. Wilson v, Aug 08 2001 STATUS approved

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Last modified August 12 07:45 EDT 2022. Contains 356067 sequences. (Running on oeis4.)