A137831 - OEIS

%I #5 Dec 31 2023 10:18:08

%S 0,0,1,2,6,8,14,18,26,42,48,68,84,92,110,140,174,186,224,252,266,312,

%T 344,396,470,510,530,572,594,638,806,858,938,966,1110,1140,1232,1328,

%U 1394,1496,1602,1638,1824,1862,1940,1980,2226,2486,2576,2622,2714,2856

%N (Prime(n)^2 minus its last digit)/20.

%F a(n) = (A001248(n)-A137807(n))/20. - _R. J. Mathar_, May 23 2008

%Y Cf. A001248, A137807.

%K nonn,base,easy

%O 1,4

%A _Paul Curtz_, Apr 29 2008

%E More terms from _R. J. Mathar_, May 23 2008