1,1
17767 is the 109-th pentagonal number and 17767=109*163 is brilliant.
Cf. A000326, A078972.
Sequence in context: A020262 A104474 A068722 this_sequence A067238 A145014 A090646
Adjacent sequences: A113938 A113939 A113940 this_sequence A113942 A113943 A113944
base,nonn
Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 31 2006
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