A256352 Composites in base 10 that remain composite in exactly six bases b, 2 <= b <= 10, expansions interpreted as decimal numbers.

10, 33, 39, 133, 183, 185, 203, 235, 291, 295, 303, 325, 343, 381, 391, 451, 475, 517, 535, 539, 561, 583, 655, 703, 723, 753, 775, 791, 799, 841, 867, 889, 895, 943, 1003, 1023, 1083, 1099, 1121, 1159, 1165, 1173, 1186, 1198, 1207, 1219, 1263, 1333, 1366

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

Crossrefs

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

Sequence in context: A231032 A232009 A137723 * A255533 A067878 A067877

Adjacent sequences: A256349 A256350 A256351 * A256353 A256354 A256355

Keyword

nonn,base

Author

Sebastian Petzelberger, Mar 25 2015

Status

approved