A076284 Numbers of the form (5^{mr}-1)/(5^r-1) for positive integers m, r.

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

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