Search: id:A002381
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%I A002381 M2614 N1034
%S A002381 0,1,3,7,8,14,29,31,42,52,66,85,99,143,161,185,190,267,273,304,330,371,
%T A002381 437,476,484,525,603,612,658,806,913,1015,1074,1197,1261,1340,1394,
%U A002381 1463,1477,1548,1606,1680,1771,1912,2009,2075,2159,2262,2439,2698,2717
%N A002381 Numbers of the form (p^2 - 1)/120 where p is 1 or prime.
%D A002381 H. Gupta, On a conjecture of Chowla, Proc. Indian Acad. Sci., 5A (1937), 
               381-384.
%D A002381 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A002381 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%o A002381 (PARI) j=[]; for(n=0,150,x=prime(n)^2-1; if(Mod(x,120)==0,j=concat(j,
               (x/120)))); j
%Y A002381 Sequence in context: A127441 A067064 A093722 this_sequence A131559 A051211 
               A105173
%Y A002381 Adjacent sequences: A002378 A002379 A002380 this_sequence A002382 A002383 
               A002384
%K A002381 nonn
%O A002381 1,3
%A A002381 N. J. A. Sloane (njas(AT)research.att.com).
%E A002381 More terms from Jason Earls (zevi_35711(AT)yahoo.com), Jul 29 2001

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