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 A052026 Composites base 10 that remain composite in all bases b, 2<=b<=10, expansions interpreted as decimal numbers. 19
 14, 18, 20, 24, 30, 32, 36, 40, 42, 44, 51, 54, 60, 62, 69, 70, 72, 74, 76, 78, 80, 86, 90, 92, 96, 98, 99, 100, 102, 104, 108, 110, 112, 114, 120, 124, 125, 126, 128, 129, 130, 132, 135, 140, 144, 146, 148, 150, 152, 156, 158, 159, 160, 162, 164, 168, 170, 174 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Sebastian Petzelberger, Table of n, a(n) for n = 1..10000 Carlos Rivera, PP&P Puzzle 24: Primes in several bases MATHEMATICA Select[Range@ 174, AllTrue[Table[FromDigits[IntegerDigits[#, i]], {i, 2, 10}], CompositeQ] &] (* Michael De Vlieger, Mar 24 2015, version 10 *) CROSSREFS Cf. A052026, A038537, A052027-A052033, A084482, A236356 Sequence in context: A063828 A365792 A060504 * A317743 A118499 A111205 Adjacent sequences: A052023 A052024 A052025 * A052027 A052028 A052029 KEYWORD nonn,base AUTHOR Patrick De Geest, Dec 15 1999 STATUS approved

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Last modified December 8 14:30 EST 2023. Contains 367679 sequences. (Running on oeis4.)