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 A076288 #6 Jun 12 2015 20:04:00
%S A076288 1,10,82,91,730,820,6562,6643,7381,59050,66430,531442,532171,538084,
%T A076288 597871,4782970,5380840,43046722,43053283,43584805,48427561,387420490,
%U A076288 387952660,435848050,3486784402,3486843451,3530369206,3922632451,31381059610,35303692060
%N A076288 Numbers of the form (9^{mr}-1)/(9^r-1) for positive integers m, r.
%H A076288 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 A076288 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 A076288 nonn
%O A076288 1,2
%A A076288 _N. J. A. Sloane_, Nov 06 2002