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A109256
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a(n) = n^6 - 11n^4 + 36n^2 - 36.
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1
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-36, -10, -4, 126, 1820, 9614, 33660, 92966, 219356, 462150, 893564, 1614830, 2763036, 4518686, 7113980, 10841814, 16065500, 23229206, 32869116, 45625310, 62254364, 83642670, 110820476, 144976646, 187474140, 239866214, 303913340
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OFFSET
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0,1
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COMMENTS
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All primes are prime divisors.
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REFERENCES
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G. Pólya and G. Szegő, Problems and Theorems in Analysis II (Springer 1924, reprinted 1972), Part Eight, Chap. 2, Sect. 1, Problem 102.
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LINKS
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FORMULA
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a(n) = (n^2 - 2)*(n^2 - 3)*(n^2 - 6).
G.f.: (-36 + 242*x - 690*x^2 + 1204*x^3 - 56*x^4 + 66*x^5 - 10*x^6)/(1-x)^7. [Colin Barker, May 11 2012]
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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STATUS
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approved
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