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A236834
Numbers that do not occur as results of "downward" remultiplication (N -> GF(2)[X]) of any number; numbers not present in A234741.
13
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
1,1
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
PROG
(Scheme, with Antti Karttunen's IntSeq-library, two variants)
(define A236834 (ZERO-POS 1 0 A236833))
(define A236834 (ZERO-POS 1 0 A236861))
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.
Sequence in context: A040600 A277190 A236849 * A033902 A354379 A009177
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 31 2014
STATUS
approved