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 A076288 Numbers of the form (9^{mr}-1)/(9^r-1) for positive integers m, r. 7
 1, 10, 82, 91, 730, 820, 6562, 6643, 7381, 59050, 66430, 531442, 532171, 538084, 597871, 4782970, 5380840, 43046722, 43053283, 43584805, 48427561, 387420490, 387952660, 435848050, 3486784402, 3486843451, 3530369206, 3922632451, 31381059610, 35303692060 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS T. Chinburg and M. Henriksen, Sums of k-th powers in the ring of polynomials with integer coefficients, Acta Arithmetica, 29 (1976), 227-250. CROSSREFS 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). Sequence in context: A043458 A038487 A043028 * A232332 A154246 A037549 Adjacent sequences:  A076285 A076286 A076287 * A076289 A076290 A076291 KEYWORD nonn AUTHOR N. J. A. Sloane, Nov 06 2002 STATUS approved

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Last modified January 19 20:23 EST 2019. Contains 319310 sequences. (Running on oeis4.)