A091246 Inverse function of A091242: position in A091242 if the n-th GF(2)[X] polynomial is reducible, 0 otherwise.

0, 0, 0, 1, 2, 3, 0, 4, 5, 6, 0, 7, 0, 8, 9, 10, 11, 12, 0, 13, 14, 15, 16, 17, 0, 18, 19, 20, 21, 22, 0, 23, 24, 25, 26, 27, 0, 28, 29, 30, 0, 31, 32, 33, 34, 35, 0, 36, 37, 38, 39, 40, 41, 42, 0, 43, 44, 45, 0, 46, 0, 47, 48, 49, 50, 51, 0, 52, 53, 54, 55, 56, 0, 57, 58, 59

Offset: 1

Author

Antti Karttunen, Jan 03 2004

Keywords

• nonn

Comments

Analogous to A066246.

Links

• A. Karttunen, Scheme-program for computing this sequence.
• Index entries for sequences operating on GF(2)[X]-polynomials

Crossrefs

Inverse of A091242.

Formula

a(n) = A091245(n) * A091247(n).