A341562 Fourier coefficients of the modular form (1/t_{3A}) * sqrt(1 - 108/t_{3A}) * F_{3A}^18.

0, 1, 12, -801, -27248, -389730, -3120012, -14532448, -35492160, -19420479, 117458280, 405309252, 1029595248, 887517566, -3584009856, -3351877470, -1982054144, -34455379518, 33499242252, 58483431740, -28952389920, 113929105248, 227377787184, -603011632584, 182257162560

Offset

0,3

Links

Table of n, a(n) for n=0..24.

Masao Koike, Modular forms on non-compact arithmetic triangle groups, Unpublished manuscript [Extensively annotated with OEIS A-numbers by N. J. A. Sloane, Feb 14 2021.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.

Formula

1/t_{3A} is A030197, F_{3A} is A004016. - Georg Fischer, Mar 31 2023

Crossrefs

Cf. A004016, A030197, A341555, A341560.

Sequence in context: A282437 A285150 A221289 * A155813 A220119 A178023

Adjacent sequences: A341559 A341560 A341561 * A341563 A341564 A341565

Keyword

sign

Author

Robert C. Lyons, Feb 14 2021

Extensions

More terms from Georg Fischer, Mar 31 2023

Status

approved