A234749 -id:A234749 - cp's OEIS frontend

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

Antti Karttunen, Feb 15 2014

nonn

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.

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

Intersection of A091242 and A118666.

Cf. A193231, A234745, A234746, A234749.

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

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

A234746 Self-inverse permutation of integers induced by the restriction of blue-code to reducible polynomials over GF(2): a(n) = A091246(A193231(A091242(n))).

Original entry on oeis.org

2, 1, 3, 9, 8, 7, 6, 5, 4, 11, 10, 12, 13, 14, 16, 15, 22, 21, 20, 19, 18, 17, 39, 38, 36, 37, 42, 41, 40, 46, 48, 47, 44, 43, 45, 25, 26, 24, 23, 29, 28, 27, 34, 33, 35, 30, 32, 31, 68, 67, 69, 63, 64, 66, 65, 72, 71, 70, 76, 75, 73, 74, 52, 53, 55, 54, 50, 49, 51, 58, 57, 56, 61, 62, 60, 59

Offset: 1

Antti Karttunen, Feb 15 2014

nonn

Fixed points: A234749.

Cf. A193231, A091242, A091246, A234745, A234751.

(define (A234746 n) (A091246 (A234745 n)))

a(n) = A091246(A234745(n)) = A091246(A193231(A091242(n))).

cp's OEIS Frontend

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

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