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A123399
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Orders of "Gray" fields.
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0
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1, 2, 3, 5, 6, 9, 11, 14, 23, 26, 29, 30, 33, 35, 39, 41, 51, 53, 65, 69, 74, 81, 83, 86, 89, 90, 95
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| D. E. Knuth, TAOCP, Section 7.2.1.1, Problem 31.
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FORMULA
| Let c_1(x) = x+1, c_2(x) = x^2+x+1, c_{j+1}(x) = x*c_j(x) + c_{j-1}(x) be polynomials over GF(2). Then n is in the sequence iff c_n(x) is a primitive irreducible polynomial.
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CROSSREFS
| Sequence in context: A008747 A054639 A070757 * A104738 A028309 A026810
Adjacent sequences: A123396 A123397 A123398 * A123400 A123401 A123402
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KEYWORD
| nonn,more
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Oct 15 2006
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