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A145128
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1 + (1200 + (634 + (225 + (85 + (15 + n)*n)*n)*n)*n)*n/720.
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6
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1, 4, 13, 38, 99, 231, 490, 960, 1761, 3058, 5071, 8086, 12467, 18669, 27252, 38896, 54417, 74784, 101137, 134806, 177331, 230483, 296286, 377040, 475345, 594126, 736659, 906598, 1108003, 1345369, 1623656, 1948320, 2325345, 2761276, 3263253, 3839046, 4497091
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listen;
history;
text;
internal format)
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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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G.f.: (x^4-4*x^3+6*x^2-3*x+1) / (1-x)^7.
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MAPLE
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a := n-> 1+ (1200+ (634+ (225+ (85+ (15+ n) *n) *n) *n) *n) *n/720: seq (a(n), n=0..40);
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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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