A076284 - OEIS

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A076284

Numbers of the form (5^{mr}-1)/(5^r-1) for positive integers m, r.

7

1, 6, 26, 31, 126, 156, 626, 651, 781, 3126, 3906, 15626, 15751, 16276, 19531, 78126, 97656, 390626, 391251, 406901, 488281, 1953126, 1968876, 2441406, 9765626, 9768751, 10172526, 12207031, 48828126, 61035156, 244140626, 244156251, 244531876, 246109501

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..34.

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), A076285 (k=6), A076286 (k=7), A076287 (k=8), A076288 (k=9), A076289 (k=10).

Sequence in context: A045225 A038474 A043006 * A177220 A157353 A271311

Adjacent sequences: A076281 A076282 A076283 * A076285 A076286 A076287

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 06 2002

STATUS

approved