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%I #6 Jun 12 2015 20:04:00
%S 1,10,82,91,730,820,6562,6643,7381,59050,66430,531442,532171,538084,
%T 597871,4782970,5380840,43046722,43053283,43584805,48427561,387420490,
%U 387952660,435848050,3486784402,3486843451,3530369206,3922632451,31381059610,35303692060
%N Numbers of the form (9^{mr}-1)/(9^r-1) for positive integers m, r.
%H T. Chinburg and M. Henriksen, <a href="http://matwbn.icm.edu.pl/ksiazki/aa/aa29/aa2932.pdf">Sums of k-th powers in the ring of polynomials with integer coefficients</a>, Acta Arithmetica, 29 (1976), 227-250.
%Y Cf. A064896 (k=2), A076270 (k=3), A076275 (k=4), A076284 (k=5), A076285 (k=6), A076286 (k=7), A076287 (k=8), A076289 (k=10).
%K nonn
%O 1,2
%A _N. J. A. Sloane_, Nov 06 2002