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A065035
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a(n+1)=a(n)^2+3a(n)+1.
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1
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0, 1, 5, 41, 1805, 3263441, 10650056950805, 113423713055421844361000441, 12864938683278671740537145998360961546653259485195805, 165506647324519964198468195444439180017513152706377497841851388766535868639572406808911988131737645185441
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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LINKS
| Harry J. Smith, Table of n, a(n) for n=0,...,12
Index entries for sequences of form a(n+1)=a(n)^2 + ...
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FORMULA
| a(n) = A007018(n)-1 = A000058(n)-2 = A060136(3, n) = A028387(a(n-1)). - Michael Somos, Feb 10, 2002
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EXAMPLE
| a(3)=a(2)^2+3*a(2)+1=25+15+1=41
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PROG
| (PARI) a(n)=if(n<1, 0, a(n-1)^2+3*a(n-1)+1)
(PARI) { for (n=0, 12, a=if(n, a^2 + 3*a + 1, 0); write("b065035.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Oct 03 2009]
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CROSSREFS
| Sequence in context: A197173 A052113 A093433 * A145008 A025173 A062021
Adjacent sequences: A065032 A065033 A065034 * A065036 A065037 A065038
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KEYWORD
| easy,nonn
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AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), Nov 03 2001
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