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A084177
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Binomial transform of Jacobsthal oblongs.
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2
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0, 1, 5, 27, 137, 691, 3465, 17347, 86777, 433971, 2170025, 10850467, 54253017, 271266451, 1356334985, 6781680387, 33908412857, 169542086131, 847710474345, 4238552459107, 21192762470297, 105963812701011, 529819064204105
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OFFSET
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0,3
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COMMENTS
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LINKS
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FORMULA
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a(n) = (2*5^n - (-1)^n - 2^n)/9.
G.f.: x*(1-x)/((1+x)*(1-2*x)*(1-5*x)).
a(n) = 6*a(n-1) - 3*a(n-2) - 10*a(n-3).
E.g.f.: (2*exp(5*x) - exp(2*x) - exp(-x))/9.
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PROG
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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