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A145227
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a(n) = denominator of constant lambda(n) involved in a recurrence for the Atkin polynomials A_k(j).
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1
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1, 1, 1, 1, 5, 5, 1, 2, 6, 3, 11, 11, 13, 91, 35, 20, 68, 51, 57, 19, 1, 11, 253, 46, 50, 325, 117, 63, 203, 29, 31, 248, 88, 187, 85, 15, 111, 703, 247, 26, 82, 287, 301, 473, 165, 345, 1081, 188, 28, 35, 85, 221, 689, 477, 495, 770, 266, 551, 1711, 59, 61, 1891, 93, 48, 1040, 715
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OFFSET
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1,5
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LINKS
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FORMULA
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For formula see Maple code.
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EXAMPLE
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720, 546, 374, 475, 2001/5, 2294/5, 410, 903/2, 2491/6, 1342/3, 4602/11, 4891/11, ...
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MAPLE
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lambda:=proc(n) if n=1 then 720 else 12*(6+(-1)^n/(n-1))*(6+(-1)^n/n); fi; end;
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CROSSREFS
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KEYWORD
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nonn,frac
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AUTHOR
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STATUS
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approved
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