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 A076289 Numbers of the form (10^{mr}-1)/(10^r-1) for positive integers m, r. 9
 1, 11, 101, 111, 1001, 1111, 10001, 10101, 11111, 100001, 111111, 1000001, 1001001, 1010101, 1111111, 10000001, 11111111, 100000001, 100010001, 101010101, 111111111, 1000000001, 1001001001, 1111111111, 10000000001, 10000100001, 10101010101, 11111111111 (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), A076288 (k=9), A076289 (k=10). Sequence in context: A333415 A264406 A057148 * A247647 A240602 A117697 Adjacent sequences:  A076286 A076287 A076288 * A076290 A076291 A076292 KEYWORD nonn AUTHOR N. J. A. Sloane, Nov 06 2002 STATUS approved

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Last modified July 24 03:29 EDT 2021. Contains 346273 sequences. (Running on oeis4.)