Search: id:A070260
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%I A070260
%S A070260 3,2,15,6,35,12,63,20,99,30,143,42,195,56,255,72,323,90,399,110,483,
%T A070260 132,575,156,675,182,783,210,899,240,1023,272,1155,306,1295,342,1443,
%U A070260 380,1599,420,1763,462,1935,506,2115,552,2303,600,2499,650,2703,702
%N A070260 Third diagonal of triangle defined in A051537.
%F A070260 n*(n+2)/4 if n is even else n*(n+2). Recurrence: a(n) = 3*a(n-2)-3*a(n-4)+a(n-6). 
               G.f.: x*(3+2*x+6*x^2-x^4)/(1-x^2)^3. - Vladeta Jovovic (vladeta(AT)eunet.rs), 
               May 09 2002
%t A070260 Table[ LCM[i + 2, i] / GCD[i + 2, i], {i, 1, 60}]
%Y A070260 Bisections: A002378, A000466.
%Y A070260 Sequence in context: A086485 A068310 A033314 this_sequence A142705 A072346 
               A103236
%Y A070260 Adjacent sequences: A070257 A070258 A070259 this_sequence A070261 A070262 
               A070263
%K A070260 nonn
%O A070260 1,1
%A A070260 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 09 2002
%E A070260 More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), May 09 2002

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