A236844 -id:A236844 - cp's OEIS frontend

A236848 Numbers that have at least one prime divisor encoding a reducible polynomial in ring GF(2)[X]; multiples of terms of A091209.

5, 10, 15, 17, 20, 23, 25, 29, 30, 34, 35, 40, 43, 45, 46, 50, 51, 53, 55, 58, 60, 65, 68, 69, 70, 71, 75, 79, 80, 83, 85, 86, 87, 89, 90, 92, 95, 100, 101, 102, 105, 106, 107, 110, 113, 115, 116, 119, 120, 125, 127, 129, 130, 135, 136, 138, 139, 140, 142, 145, 149, 150

Offset: 1

Antti Karttunen, Jan 31 2014

nonn

Numbers that are divisible by at least one prime whose binary representation encodes a polynomial which is reducible in polynomial ring GF(2)[X].

Antti Karttunen, Table of n, a(n) for n = 1..12311

Disjoint union of A236844 and A236849.
Complement: A236860.
Cf. A091209, A236838.

A236849 Numbers that occur as results of remultiplication (GF(2)[X] -> N) of some number and have at least one prime divisor encoding a reducible polynomial in ring GF(2)[X].

Original entry on oeis.org

25, 50, 55, 75, 87, 100, 110, 115, 145, 150, 165, 174, 175, 185, 200, 203, 213, 220, 225, 230, 253, 261, 275, 285, 290, 299, 300, 301, 319, 325, 330, 345, 348, 350, 355, 357, 370, 375, 385, 391, 395, 400, 406, 415, 425, 426, 435, 440, 445, 450, 460, 475, 477, 495, 505, 506, 515, 522, 525, 529, 535, 545, 550, 555

Offset: 1

Antti Karttunen, Jan 31 2014

nonn

Terms of A236842 (A234742) that are divisible by at least one of the primes in A091209.

a(4)=75, is the first term here which does not occur in A236834. On the other hand, A236834(5)=91 is the first of its terms that does not occur here.

Antti Karttunen, Table of n, a(n) for n = 1..13105

Setwise difference A236848 \ A236844, and also A236842 \ A236860.

Cf. A091209, A234742, A236842, A236848, A236834.

cp's OEIS Frontend

A236848 Numbers that have at least one prime divisor encoding a reducible polynomial in ring GF(2)[X]; multiples of terms of A091209.

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