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 A145226 a(n) = numerator of constant lambda(n) involved in a recurrence for the Atkin polynomials A_k(j). 1
 720, 546, 374, 475, 2001, 2294, 410, 903, 2491, 1342, 4602, 4891, 5467, 40290, 14774, 8827, 28785, 22454, 24182, 8349, 425, 4826, 107682, 20155, 21307, 142242, 49910, 27547, 86673, 12670, 13246, 108273, 37627, 81590, 36366, 6541, 47515, 306402, 105782, 11327 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..40. M. Kaneko and D. Zagier, Supersingular j-invariants, hypergeometric series and Atkin's orthogonal polynomials, pp. 97-126 of D. A. Buell and J. T. Teitelbaum, eds., Computational Perspectives on Number Theory, Amer. Math. Soc., 1998 FORMULA For formula see Maple code. EXAMPLE 720, 546, 374, 475, 2001/5, 2294/5, 410, 903/2, 2491/6, 1342/3, 4602/11, 4891/11, ... MAPLE lambda:=proc(n) if n=1 then 720 else 12*(6+(-1)^n/(n-1))*(6+(-1)^n/n); fi; end; CROSSREFS Cf. A145227. Sequence in context: A267287 A267746 A267026 * A056467 A056457 A068351 Adjacent sequences: A145223 A145224 A145225 * A145227 A145228 A145229 KEYWORD nonn,frac AUTHOR N. J. A. Sloane, Feb 28 2009 STATUS approved

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Last modified September 12 12:03 EDT 2024. Contains 375851 sequences. (Running on oeis4.)