A377292 Terms of A118666 as produced by the program given there (without the final sorting).

0, 1, 6, 7, 20, 18, 21, 19, 120, 108, 126, 106, 121, 109, 127, 107, 272, 360, 260, 380, 278, 366, 258, 378, 273, 361, 261, 381, 279, 367, 259, 379, 1632, 1904, 1560, 1800, 1652, 1892, 1548, 1820, 1638, 1910, 1566, 1806, 1650, 1890, 1546, 1818, 1633, 1905, 1561, 1801

Offset

0,3

Links

Table of n, a(n) for n=0..51.

Joerg Arndt, Matters Computational (The Fxtbook), section 1.19.3 "Fixed points of the blue code", p.52-54, with a(n) = blue_fixed_point(n).

Index entries for sequences operating on (or containing) GF(2)[X]-polynomials

Formula

a(2^k) = A117998(k).

Prog

(C++) // See Fxtbook link, "blue_fixed_point()".
(Python)
A048726 = lambda n: (n << 2) ^ (n << 1)
def a(n):
    if n == 0: return 0
    f, s = 1, n
    while s > 1:
        f = A048726(f) | (s & 1)
        s >>= 1
    return f
print([a(n) for n in range(0, 52)])

Crossrefs

Cf. A118666, A117998.

Sequence in context: A285840 A285819 A287760 * A305675 A210605 A175262

Adjacent sequences: A377289 A377290 A377291 * A377293 A377294 A377295

Keyword

nonn

Author

Darío Clavijo, Dec 27 2024

Status

approved