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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

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