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A065035 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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