The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A285981 Number of Carlitz compositions having at least two identical parts. 1
 0, 0, 0, 0, 1, 2, 3, 10, 20, 44, 67, 149, 277, 528, 959, 1673, 3107, 5572, 9992, 17801, 31647, 55379, 98445, 173288, 305355, 536709, 943353, 1655316, 2900221, 5088098, 8916905, 15624332, 27368888, 47935241, 83939143, 146974040, 257277523, 450432510, 788487147 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,6 LINKS Alois P. Heinz, Table of n, a(n) for n = 0..4100 FORMULA a(n) = A003242(n) - A032020(n). EXAMPLE For n=7, there are a(7) = 10 Carlitz compositions with at least two identical parts: 1,5,1; 2,3,2; 3,1,3; 1,2,1,3; 1,2,3,1; 1,3,1,2; 1,3,2,1; 2,1,3,1; 3,1,2,1 and 1,2,1,2,1. CROSSREFS Cf. A003242, A032020. Sequence in context: A328780 A184261 A095919 * A264038 A148044 A148045 Adjacent sequences: A285978 A285979 A285980 * A285982 A285983 A285984 KEYWORD nonn AUTHOR Gregory L. Simay, Apr 29 2017 EXTENSIONS More terms from Alois P. Heinz, Apr 29 2017 STATUS approved

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

Last modified February 2 12:13 EST 2023. Contains 360011 sequences. (Running on oeis4.)