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 A029828 Eisenstein series E_12(q) (alternate convention E_6(q)), multiplied by 691. 27
 691, 65520, 134250480, 11606736960, 274945048560, 3199218815520, 23782204031040, 129554448266880, 563087459516400, 2056098632318640, 6555199353000480, 18693620658498240, 48705965462306880, 117422349017369760, 265457064498837120, 566735214731736960, 1153203117089652720 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 REFERENCES R. C. Gunning, Lectures on Modular Forms. Princeton Univ. Press, Princeton, NJ, 1962, p. 53. N. Koblitz, Introduction to Elliptic Curves and Modular Forms, Springer-Verlag, 1984, see p. 111. J.-P. Serre, Course in Arithmetic, Chap. VII, Section 4. LINKS Seiichi Manyama, Table of n, a(n) for n = 0..10000 MAPLE E := proc(k) local n, t1; t1 := 1-(2*k/bernoulli(k))*add(sigma[k-1](n)*q^n, n=1..60); series(t1, q, 60); end; E(12); MATHEMATICA Table[If[n == 0, 691, 65520 DivisorSigma[11, n]], {n, 0, 16}] (* Jean-François Alcover, Feb 26 2018 *) PROG (PARI) a(n)=if(n<1, 691*(n==0), 65520*sigma(n, 11)) CROSSREFS Cf. A037164. Cf. A006352 (E_2), A004009 (E_4), A013973 (E_6), A008410 (E_8), A013974 (E_10), A029828 (E_12), A058550 (E_14), A029829 (E_16), A029830 (E_20), A029831 (E_24). Sequence in context: A029814 A135843 A130662 * A288837 A290049 A288989 Adjacent sequences:  A029825 A029826 A029827 * A029829 A029830 A029831 KEYWORD nonn AUTHOR STATUS approved

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Last modified August 3 20:08 EDT 2020. Contains 336201 sequences. (Running on oeis4.)