0,6
Non-odd primes with placeholders for primes between them.
a(n)=2n-A128059(n);
Sequence in context: A072224 A085660 A092578 this_sequence A081582 A014761 A073702
Adjacent sequences: A128057 A128058 A128059 this_sequence A128061 A128062 A128063
easy,sign
Paul Barry (pbarry(AT)wit.ie), Feb 13 2007
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