A147530 - OEIS

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A147530

Numbers x such that exists n in N : (x+1)^3-x^3=103*n^2

51721, 6641322533431006, 852782015075257739882069713, 109501859241899448880038629652254160358, 14060635620199598237672957867104207073195290510201 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	FORMULA	`a(n+2)=128405450990a(n+1)-a(n)+62402725494` `a(n)=-(3466818083/7133636166)+(368962262959769/14267272332){[64202725495+3652365444 sqrt(309)]^n+[64202725495-3652365444sqrt(309)]^n-(276721847228447/188096820366){[64202725495-3652365444sqrt(309)]^n sqrt(309)-[64202725495+3652365444sqrt(309)]^n *sqrt(309)}, with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Nov 25 2008]`
	EXAMPLE	`a(1)=51721 because the first relation is : 51722^3-71721^3=103*8827^2`
	CROSSREFS	`Sequence in context: A203405 A152512 A203354 * A184454 A003134 A191303` `Adjacent sequences: A147527 A147528 A147529 * A147531 A147532 A147533`
	KEYWORD	`easy,nonn`
	AUTHOR	`Richard Choulet (richardchoulet(AT)yahoo.fr), Nov 06 2008`

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Last modified February 16 02:51 EST 2012. Contains 205860 sequences.