1,1
Is a(n) always prime?
a(4) = 17-A072181(4) = 17-12 = 5.
Cf. A005235, A055211, A037153, A037155, A072181.
Sequence in context: A159477 A123318 A111060 this_sequence A037153 A077724 A163867
Adjacent sequences: A082429 A082430 A082431 this_sequence A082433 A082434 A082435
more,nonn
Naohiro Nomoto (n_nomoto(AT)yabumi.com), Apr 25 2003
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