A236834 Numbers that do not occur as results of "downward" remultiplication (N -> GF(2)[X]) of any number; numbers not present in A234741.

25, 50, 55, 87, 91, 100, 110, 115, 117, 133, 143, 145, 159, 171, 174, 182, 185, 200, 203, 213, 220, 230, 234, 237, 247, 249, 253, 266, 267, 279, 285, 286, 290, 299, 301, 318, 319, 321, 333, 339, 342, 345, 348, 351, 355, 357, 361, 364, 369, 370, 375, 385, 391, 395, 400

Offset: 1

Author

Antti Karttunen, Jan 31 2014

Keywords

• nonn

Comments

Numbers that do not occur in A234741 (A236841).

This is a subsequence of A236838, thus all terms are GF(2)[X]-multiples of some of the terms of A091214. (Cf. also A236844).

a(5)=91 is the first term that does not occur in A236849. On the other hand, A236849(4)=75, is the first term in the latter which does not occur here.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..2525

Crossrefs

Complement: A236841. This sequence is a setwise difference of A236838 and A236839.

A091214 is a subsequence.

Positions of zeros in A236833, A236836, A236837 and A236861

Cf. also A236844, A234741, A236835.