OFFSET
0,3
LINKS
Harry J. Smith, Table of n, a(n) for n = 0..200
FORMULA
mu(n)* binomial(2*n, n)/(n+1); or mu(n) * A000108(n).
MATHEMATICA
Join[{1}, Table[MoebiusMu[n]CatalanNumber[n], {n, 40}]] (* Harvey P. Dale, Jan 30 2022 *)
PROG
(PARI) a(n)={if(n==0, 1, moebius(n)*binomial(2*n, n)/(n + 1))}
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Jason Earls, Jul 04 2001
STATUS
approved