1,1

obtained with the fundamental unit 64202725495+3652365444*\sqrt(309) of Q(sqrt(309))

a(n+2)=128405450990*a(n+1)-a(n);

a(n)=909181*{[64202725495+3652365444*sqrt(309)]^n+[64202725495-3652365444*sqrt(309)]^n}-(103443/2)*{[64202725495-3652365444 *sqrt(309)]^n*sqrt(309)-[64202725495+3652365444*sqrt(309)]^n*sqrt(309)}, with n>=0 [From Paolo P. Lava (ppl(AT)spl.at), Nov 25 2008]

a(1)=1818362 because the first relation is : 1818362^2=309*103443^2+103

Sequence in context: A140861 A137819 A145537 this_sequence A115495 A015347 A145276

Adjacent sequences: A147522 A147523 A147524 this_sequence A147526 A147527 A147528

easy,nonn

Richard Choulet (richardchoulet(AT)yahoo.fr), Nov 06 2008