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A256353 Composites in base 10 that remain composite in five bases b, 2<=b<=10, expansions interpreted as decimal numbers. 3
55, 169, 247, 253, 323, 493, 529, 556, 671, 1027, 1111, 1243, 1261, 1339, 1375, 1711, 1751, 1803, 2185, 2413, 2431, 2881, 3193, 4381, 4417, 4843, 5029, 5203, 5251, 6631, 7093, 7999, 8515, 8653, 9271, 9307 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Less remaining is not possible for even numbers.

LINKS

Sebastian Petzelberger, Table of n, a(n) for n = 1..10000

Carlos Rivera, PP&P Puzzle 24: Primes in several bases

CROSSREFS

Cf. A052026, A256350-A256356, A038537, A052027-A052033, A084482, A236356.

Sequence in context: A044387 A044768 A276050 * A068641 A039781 A135657

Adjacent sequences:  A256350 A256351 A256352 * A256354 A256355 A256356

KEYWORD

nonn,base

AUTHOR

Sebastian Petzelberger, Mar 25 2015

STATUS

approved

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Last modified November 16 07:05 EST 2018. Contains 317258 sequences. (Running on oeis4.)