id:A065035 - OEIS Search Results

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a(n+1)=a(n)^2+3a(n)+1.

+0
1

0, 1, 5, 41, 1805, 3263441, 10650056950805, 113423713055421844361000441, 12864938683278671740537145998360961546653259485195805, 165506647324519964198468195444439180017513152706377497841851388766535868639572406808911988131737645185441 (list; graph; listen)

	OFFSET	`0,3`
	LINKS	`Index entries for sequences of form a(n+1)=a(n)^2 + ...`
	FORMULA	`a(n) = A007018(n)-1 = A000058(n)-2 = A060136(3, n) = A028387(a(n-1)). - Michael Somos, Feb 10, 2002`
	EXAMPLE	`a(3)=a(2)^2+3*a(2)+1=25+15+1=41`
	PROGRAM	`(PARI) a(n)=if(n<1, 0, a(n-1)^2+3*a(n-1)+1)`
	CROSSREFS	`Sequence in context: A003719 A052113 A093433 this_sequence A025173 A062021 A082145` `Adjacent sequences: A065032 A065033 A065034 this_sequence A065036 A065037 A065038`
	KEYWORD	`easy,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Nov 03 2001`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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