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4194304, 31381059609, 4049565169664, 116490258898219, 1521681143169024, 12200509765705829, 70188843638032384, 317475837322472439, 1196683881290399744, 3909821048582988049, 11384956040305711104
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OFFSET
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0,1
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COMMENTS
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If 5n+4 is a perfect square, that is for n=0,1,9,12,28,33,57,64,..., a(n)=A010810(j), where the indices j are listed in A047221. - R. J. Mathar, Apr 22 2008.
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (12,-66,220,-495,792,-924,792,-495,220,-66,12,-1).
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FORMULA
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G.f.: (x^11 +362797044*x^10 +280958106005*x^9 +14192390602560*x^8 +157922022917730*x^7 +565509776420088*x^6 +753319100251602*x^5 +384167580654720*x^4 +69965704049565*x^3 +3673269278420*x^2 +31330727961*x +4194304) / (x -1)^12. [Colin Barker, Feb 22 2013]
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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