A107042 First differences of indices of squarefree Catalan numbers.

1, 1, 1, 1, 2, 1, 1, 2, 6, 2, 12, 4

Offset: 0

Author

Paul Barry, May 09 2005

Keywords

• nonn

Comments

First differences of A080664. Next term is > 9965.

Crossrefs

Cf. A000108.

Programs

Mathematica

Differences[Position[CatalanNumber[Range[2,50]],?SquareFreeQ]//Flatten] (* _Harvey P. Dale, Dec 04 2017 *)