1,1
For p=2, 4p-5=3; p=19, 4p-5=71; p=127, 4p-5=503
Cf. A156287, A156288
Sequence in context: A130272 A038940 A019383 this_sequence A067834 A070754 A049887
Adjacent sequences: A156297 A156298 A156299 this_sequence A156301 A156302 A156303
nonn
Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Feb 07 2009
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