1,1
Nonprime digits = 0, 1, 4, 6, 8 and 9.
Cf. A000040, A141468.
Sequence in context: A049485 A019393 A029489 this_sequence A133855 A141855 A140603
Adjacent sequences: A155021 A155022 A155023 this_sequence A155025 A155026 A155027
fini,nonn,base
Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 19 2009
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