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%I #7 Oct 12 2018 03:28:58
%S 7,91,133,91,217
%N Denominators of the Matter numbers H_6n^6n.
%H Haruzo Hida, <a href="http://gdz.sub.uni-goettingen.de/dms/resolveppn/?PPN=GDZPPN002096978">Congruences of Cusp Forms and Special Values of Their Zeta Functions</a>, Invent. Math., 63 (1981), 225-261. See (6.10).
%e 24/7, 518400/91, 32845824000/133, 7960251138048000/91, 31637222123057971200000/217, ...
%Y Cf. A319977.
%K nonn,frac,more
%O 1,1
%A _N. J. A. Sloane_, Oct 11 2018