A057892 -id:A057892 - cp's OEIS frontend

A057893 Negabinary numbral multiplication table.

0, 0, 0, 0, 1, 0, 0, 2, 2, 0, 0, 3, 4, 3, 0, 0, 4, 6, 6, 4, 0, 0, 5, 8, 1, 8, 5, 0, 0, 6, 10, 12, 12, 10, 6, 0, 0, 7, 12, 15, 16, 15, 12, 7, 0, 0, 8, 14, 2, 20, 20, 2, 14, 8, 0, 0, 9, 16, 13, 24, 105, 24, 13, 16, 9, 0, 0, 10, 18, 24, 28, 30, 30, 28, 24, 18, 10, 0, 0, 11, 20, 27, 32, 19, 4

Offset: 0

Marc LeBrun, Sep 25 2000

Units are [1]=1 and [3]=-1.

			a(17)=6 since a(17) corresponds to the table entry for [3]+[2]=-1*-2=2=4-2=[6]

Cf. A005351, A005352, A057892, A057894.

A057894 Negabinary numbral "primes".

Original entry on oeis.org

2, 5, 6, 7, 9, 13, 15, 17, 23, 27, 29, 31, 33, 39, 43, 47, 51, 53, 55, 57, 61, 71, 77, 79, 83, 87, 89, 91, 99, 101, 107, 109, 115, 117, 121, 127, 129, 139, 141, 147, 149, 151, 167, 169, 173, 181, 185, 191, 197, 199, 201, 203, 205, 209, 213, 223, 227, 233, 239, 241

Offset: 0

Marc LeBrun, Sep 25 2000

"Primes" have no other distinct divisors, up to multiplication by units. (Units are [1]=1 and [3]=-1.)

			[2]=-2, [5]=5, [6]=2, [7]=3, [9]=-7, [13]=-3, etc

A005351, A005352, A057892, A057893.

cp's OEIS Frontend

A057893 Negabinary numbral multiplication table.

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