A234752 Binary encodings of reducible polynomials over GF(2)that are fixed by blue code: a(n) = A091242(A234749(n)).

6, 18, 20, 21, 106, 107, 108, 120, 121, 126, 127, 258, 259, 260, 261, 272, 273, 278, 279, 360, 366, 367, 378, 380, 381, 1546, 1547, 1548, 1549, 1560, 1561, 1566, 1567, 1632, 1633, 1638, 1639, 1650, 1651, 1652, 1653, 1800, 1801, 1806, 1818, 1819, 1820, 1890, 1892, 1893, 1904, 1905, 1910, 1911

Offset

1,1

Comments

Irreducible polynomials over GF(2) (A014580) fixed by blue code (A193231) seem to be much rarer. The first 22 cases are: 7, 19, 109, 361, 379, 1807, 1821, 1891, 4645, 4663, 4897, 4915, 4941, 27327, 27329, 27589, 27607, 27829, 27851, 28067, 28081, 28125.

Links

Antti Karttunen, Table of n, a(n) for n = 1..232

Formula

a(n) = A091242(A234749(n)).

Prog

(Scheme) (define (A234752 n) (A091242 (A234749 n)))

Crossrefs

Intersection of A091242 and A118666.

Cf. A193231, A234745, A234746, A234749.

Sequence in context: A045857 A074791 A093106 * A370865 A370863 A114452

Adjacent sequences: A234749 A234750 A234751 * A234753 A234754 A234755

Keyword

nonn

Author

Antti Karttunen, Feb 15 2014

Status

approved