1,1
3151 is the 46th pentagonal number and 1513=17*89 is brilliant.
Cf. A000326, A078972, A115679.
Sequence in context: A051797 A145886 A166776 this_sequence A066757 A045219 A054410
Adjacent sequences: A115677 A115678 A115679 this_sequence A115681 A115682 A115683
nonn,base
Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 31 2006
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