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 A341560 #8 Mar 31 2023 06:48:59
%S A341560 0,1,-12,-729,-8048,-30210,8748,235088,194880,531441,362520,-11182908,
%T A341560 5866992,8049614,-2821056,22023090,63590656,-117494622,-6377292,
%U A341560 -214061380,243130080,-171379152,134194896,830555544,-142067520,-308059025,-96595368,-387420489,-1891988224
%N A341560 Fourier coefficients of the modular form (1/t_{3A}) * sqrt( 1-108/t_{3A} ) * F_{3A}^14.
%H A341560 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, Unpublished manuscript [Extensively annotated with OEIS A-numbers by N. J. A. Sloane, Feb 14 2021.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 30.
%F A341560 1/t_{3A} is A030197, F_{3A} is A004016. - _Georg Fischer_, Mar 31 2023
%Y A341560 Cf. A004016, A030197, A341305, A341554, A341559.
%K A341560 sign
%O A341560 0,3
%A A341560 _Robert C. Lyons_, Feb 14 2021
%E A341560 More terms from _Georg Fischer_, Mar 31 2023