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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
1, 4, 6, 8, 12, 14, 16, 22, 24, 26, 28, 32, 38, 44, 48, 52, 56, 62, 64, 74, 76, 82, 88, 94, 96, 104, 111, 112, 118, 122, 123, 124, 128, 134, 146, 148, 152, 164, 176, 188, 192, 194, 206, 208, 218, 219, 222, 224, 236, 244, 246, 248, 256, 262, 268, 274, 292, 296, 304 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

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

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..1890

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

PROG

(Scheme, with Antti Karttunen's IntSeq-library)

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

CROSSREFS

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

Sequence in context: A047407 A090697 A225508 * A107303 A028876 A271346

Adjacent sequences:  A235033 A235034 A235035 * A235037 A235038 A235039

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jan 02 2014

STATUS

approved

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Last modified April 9 20:55 EDT 2020. Contains 333363 sequences. (Running on oeis4.)