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A235036 Nonprime numbers which are factored to the same set of primes in Z as to the irreducible polynomials in GF(2)[X]. 5

%I #10 Jan 29 2014 12:25:00

%S 1,4,6,8,12,14,16,22,24,26,28,32,38,44,48,52,56,62,64,74,76,82,88,94,

%T 96,104,111,112,118,122,123,124,128,134,146,148,152,164,176,188,192,

%U 194,206,208,218,219,222,224,236,244,246,248,256,262,268,274,292,296,304

%N Nonprime numbers which are factored to the same set of primes in Z as to the irreducible polynomials in GF(2)[X].

%C Note: Start indexing from n=1 if you want just composite numbers. a(0)=1 is the only nonprime, noncomposite in this list.

%H Antti Karttunen, <a href="/A235036/b235036.txt">Table of n, a(n) for n = 0..1890</a>

%H <a href="/index/Ge#GF2X">Index entries for sequences operating on (or containing) GF(2)[X]-polynomials</a>

%o (Scheme, with _Antti Karttunen_'s IntSeq-library)

%o (define A235036 (MATCHING-POS 0 1 (lambda (n) (and (not (prime? n)) (equal? (ifactor n) (GF2Xfactor n))))))

%Y These are nonprime (and nonzero) numbers in A235032. Also a subsequence of A235045 and (apart from 1) of A091212. A235039 gives the odd terms.

%K nonn

%O 0,2

%A _Antti Karttunen_, Jan 02 2014

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)