0,2
If "2" were a cluster point of this sequence it would follow that there are infinitely many twin primes.
Cf. A054988 and A054989.
Sequence in context: A080092 A164738 A126225 this_sequence A106245 A129568 A117122
Adjacent sequences: A056157 A056158 A056159 this_sequence A056161 A056162 A056163
hard,nonn
Arne Ring (arne.ring(AT)epost.de), Aug 01 2000
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