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A016998
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a(n) = (7*n + 1)^6.
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1
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1, 262144, 11390625, 113379904, 594823321, 2176782336, 6321363049, 15625000000, 34296447249, 68719476736, 128100283921, 225199600704, 377149515625, 606355001344, 941480149401, 1418519112256, 2081951752609
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = 7*a(n-1) - 21*a(n-2) + 35*a(n-3) - 35*a(n-4) + 21*a(n-5) - 7*a(n-6) + a(n-7); a(0)=1, a(1)=262144, a(2)=11390625, a(3)=113379904, a(4)=594823321, a(5)=2176782336, a(6)=6321363049. - Harvey P. Dale, Jun 11 2014
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MAPLE
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MATHEMATICA
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(7*Range[0, 20]+1)^6 (* or *) LinearRecurrence[{7, -21, 35, -35, 21, -7, 1}, {1, 262144, 11390625, 113379904, 594823321, 2176782336, 6321363049}, 20] (* Harvey P. Dale, Jun 11 2014 *)
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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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