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 A047803 #10 May 22 2021 04:33:03 %S A047803 1,720,146512,8565952,196434000,2317602912,17225174720,93710019456, %T A047803 407503812688,1487330605840,4744665673056,13523554712640, %U A047803 35251061710528,84944383084512,192127846616960,409984044318336,834655060080720 %N A047803 Theta series of 24-dimensional lattice D_16 + E_8. %F A047803 G.f.: d16(q) * e8(q) where e8(q) = 1 + 240*q^2 + 2160*q^4 + ... is the theta series for A004009 and d16(q) = 1 + 480*q^2 + 29152*q^4 + ... is the theta series for A022047. - _Sean A. Irvine_, May 21 2021 %Y A047803 Cf. A004009, A022047 %K A047803 nonn %O A047803 0,2 %A A047803 _N. J. A. Sloane_ %E A047803 Description corrected by Dave Yuen, May 01 2002