A076275 - OEIS

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A076275

Numbers of the form (4^{mr}-1)/(4^r-1) for positive integers m, r.

7

1, 5, 17, 21, 65, 85, 257, 273, 341, 1025, 1365, 4097, 4161, 4369, 5461, 16385, 21845, 65537, 65793, 69905, 87381, 262145, 266305, 349525, 1048577, 1049601, 1118481, 1398101, 4194305, 5592405, 16777217, 16781313, 16843009, 17043521, 17895697, 22369621

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..36.

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), A076284 (k=5), A076285 (k=6), A076286 (k=7), A076287 (k=8), A076288 (k=9), A076289 (k=10).

Sequence in context: A032376 A145818 A029986 * A316307 A317262 A031270

Adjacent sequences: A076272 A076273 A076274 * A076276 A076277 A076278

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 06 2002

STATUS

approved