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Search: id:A131515
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| A131515 |
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a(n+2) = 34*a(n+1) - a(n) + 2; a(1) = 1 and a(2) = 16 |
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+0
1
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| 1, 16, 545, 18516, 629001, 21367520, 725866681, 24658099636
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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Chip Curtis, "Generating Heronian Triangles", The College Mathematics Journal, vol. 38 (2007), pp. 315-316. See page 316.
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FORMULA
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G.f.: -x*(1-19*x+20*x^2)/(-1+x)/(1-34*x+x^2). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 14 2007
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EXAMPLE
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If n=3 then a(3) = 34*a(2) - a(1) + 2 = 545 which is the third term in the sequence.
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CROSSREFS
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Cf. A016064.
Cf. A001110.
Sequence in context: A099772 A041483 A041480 this_sequence A063082 A089156 A135786
Adjacent sequences: A131512 A131513 A131514 this_sequence A131516 A131517 A131518
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KEYWORD
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nonn
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AUTHOR
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Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Aug 14 2007
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EXTENSIONS
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Definition corrected by Rick L. Shepherd (rshepherd2(AT)hotmail.com), Aug 17 2007
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