This site is supported by donations to The OEIS Foundation.

 Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS". Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A091221 Number of distinct irreducible polynomials dividing n-th GF(2)[X]-polynomial. 9
 0, 1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 2, 1, 1, 1, 3, 1, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 1, 2, 2, 2, 3, 1, 2, 2, 2, 1, 2, 2, 2, 2, 3, 1, 2, 2, 2, 1, 2, 2, 3, 1, 2, 2, 3, 1, 2, 1, 2, 2, 1, 2, 3, 1, 2, 1, 3, 2, 3, 1, 2, 2, 2, 2, 3, 2, 2, 1, 2, 3, 2, 1, 3, 1, 2, 2, 3, 1, 3, 2, 2, 2, 2, 1, 3, 2, 2, 3, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,6 LINKS A. Karttunen, Scheme-program for computing this sequence. CROSSREFS a(n) = A001221(A091203(n)) = A001221(A091205(n)). A000374(n) = a(A000051(n)). Sequence in context: A177025 A265210 A023396 * A106495 A100428 A206719 Adjacent sequences:  A091218 A091219 A091220 * A091222 A091223 A091224 KEYWORD nonn AUTHOR Antti Karttunen, Jan 03 2004 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.