This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A032430 #25 Jul 09 2022 11:08:09 %S A032430 1,8071256,74197080276,128453495887560,107266611330420090, %T A032430 59752013018382750024,25835579116799316507780, %U A032430 9424979520638053300516632,3051808875538951440990525939,906467723949073501017465886864,252583298644057469403578416269848 %N A032430 Coefficients of Jacobi elliptic function c(7,m). %H A032430 A. Fransen, <a href="http://dx.doi.org/10.1090/S0025-5718-1981-0628708-X">Conjectures on the Taylor series expansion coefficients of the Jacobian elliptic function sn(n,k)</a>, Math. Comp., 37 (1981), 475-497. %F A032430 a(n) = T(2*n+1,0,7) where T(1,0,0) = 1; T(n,i,j) = 0 if i+j < 0 or i+j > n/2; T(2*n,i,j) = (2*j+1) * T(2*n-1,i,j) + (2*i+2) * T(2*n-1,i+1,j-1) + (2*n-2*i-2*j+1) * T(2*n-1,i,j-1), and T(2*n+1,i,j) = (2*i+1) * T(2*n-1,i,j) + (2*j+2) * T(2*n,i-1,j+1) + (2*n-2*i-2*j+2) * T(2*n-1,i-1,j). - _Sean A. Irvine_, Jun 20 2020 %Y A032430 Cf. A060628 (7th lower diagonal). %K A032430 nonn %O A032430 7,2 %A A032430 _Simon Plouffe_ %E A032430 Offset corrected and more terms from _Sean A. Irvine_, Jun 20 2020