A076285 Numbers of the form (6^{mr}-1)/(6^r-1) for positive integers m, r.

1, 7, 37, 43, 217, 259, 1297, 1333, 1555, 7777, 9331, 46657, 46873, 47989, 55987, 279937, 335923, 1679617, 1680913, 1727605, 2015539, 10077697, 10124569, 12093235, 60466177, 60473953, 62193781, 72559411, 362797057, 435356467, 2176782337, 2176828993, 2178463249

Offset

1,2

Links

Robert Israel, Table of n, a(n) for n = 1..9380

T. Chinburg and M. Henriksen, Sums of k-th powers in the ring of polynomials with integer coefficients, Acta Arithmetica, 29 (1976), 227-250.

Maple

1, seq(seq((6^(m+r)-1)/(6^r-1), r = sort(convert(numtheory:-divisors(m), list), `>`)), m=0..15); # Robert Israel, May 02 2018

Crossrefs

Sequence in context: A141159 A092475 A106924 * A077720 A235463 A127313

Adjacent sequences: A076282 A076283 A076284 * A076286 A076287 A076288

Keyword

nonn

Author

N. J. A. Sloane, Nov 06 2002

Status

approved