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A047683
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a(n) = 5^(2*n)*(5^(2*n)-1)*Bernoulli(2*n)/(2*n).
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3
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50, -3250, 968750, -635781250, 722480468750, -1257228613281250, 3104408581542968750, -10320446545227050781250, 44440884525382995605468750, -240617847532228950500488281250, 1599915691073966364860534667968750, -12816452064605408400845527648925781250
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OFFSET
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1,1
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REFERENCES
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J. W. Milnor and J. D. Stasheff, Characteristic Classes, Princeton, 1974, p. 283.
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LINKS
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PROG
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(PARI) a(n) = 5^(2*n)*(5^(2*n)-1)*bernfrac(2*n)/(2*n) \\ Andrew Howroyd, May 18 2020
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CROSSREFS
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Row sums of even-indexed rows of A211234.
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KEYWORD
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sign
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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