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 A055405 #11 Sep 29 2019 13:22:45 %S A055405 1,7,63,337,1319,3819,9763,21374,43774,81586,145138,243345,394696, %T A055405 612274,928616,1363401,1967428,2762729,3825273,5197436,6974412, %U A055405 9198648,12019669,15500750,19827441,25050955,31438147,39053729,48254762 %N A055405 Number of points in N^6 of norm <= n. %H A055405 Andrew Howroyd, <a href="/A055405/b055405.txt">Table of n, a(n) for n = 0..500</a> %F A055405 a(n) = [x^(n^2)] (1 + theta_3(x))^6/(64*(1 - x)), where theta_3() is the Jacobi theta function. - _Ilya Gutkovskiy_, Apr 15 2018 %Y A055405 Column k=6 of A302998. %K A055405 nonn %O A055405 0,2 %A A055405 _David W. Wilson_