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%I #17 Jul 07 2023 14:57:39
%S 1,6,41,281,1721,1926,13201,72241,80646,90481,493921,620166,2963561,
%T 3032401,3788441,4250681,23145121,29134601,127288601,141753606,
%U 158630641,177975881,199691526,870287321
%N Generalized Markoff numbers: largest of 7-tuple of positive numbers a, b, c, d, e, f, g satisfying the Markoff(7) equation a^2+b^2+c^2+d^2+e^2+f^2+g^2 = 7abcdefg.
%C For n = 1, 2, 3, 4, 6, 7, 10, 12, 16, 18, 23, a(n) is in A049685.
%e a(1)=1 and a(2)=6 since (1, 1, 1, 1, 1, 1, 1) and (6, 1, 1, 1, 1, 1, 1) satisfying a^2+b^2+c^2+d^2+e^2+f^2+g^2=7abcdefg.
%Y Cf. A049685, A000032.
%Y Cf. A227210, A227211, A227212.
%K nonn,more
%O 1,2
%A _Shanzhen Gao_, Sep 19 2013
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