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 A341555 #15 May 31 2025 18:38:14
%S A341555 0,1,-36,-81,784,-1314,2916,-4480,-9792,6561,47304,1476,-63504,
%T A341555 -151522,161280,106434,-48896,108162,-236196,593084,-1030176,362880,
%U A341555 -53136,-969480,793152,-226529,5454792,-531441,-3512320,-6642522,-3831624,7070600,6773760,-119556,-3893832
%N A341555 Fourier coefficients of the modular form (1/t_{3A}) * sqrt(1 - 108/t_{3A}) * F_{3A}^10.
%H A341555 Masao Koike, <a href="/A004016/a004016.pdf">Modular forms on non-compact arithmetic triangle groups</a>, Unpublished manuscript [Extensively annotated with OEIS A-numbers by N. J. A. Sloane, Feb 14 2021. Sloane wrote 2005 on the first page but the internal evidence suggests 1997.] See page 29.
%F A341555 1/t_{3A} is A030197, F_{3A} is A004016. - _Georg Fischer_, Mar 31 2023
%Y A341555 Cf. A004016, A030197, A341305, A341554, A341560, A341562.
%K A341555 sign
%O A341555 0,3
%A A341555 _Robert C. Lyons_, Feb 14 2021
%E A341555 More terms from _Georg Fischer_, Mar 31 2023