A259700 a(n) = Sum_{k=2..n-1} k*A259698(n,k)

1, 3, 8, 25, 72, 229, 689, 2224, 6875, 22457, 70767

Offset

2,2

Comments

Sade gives a(5)=25, but that is wrong.

Links

Table of n, a(n) for n=2..12.

Albert Sade, Sur les Chevauchements des Permutations, published by the author, Marseille, 1949. [Annotated scanned copy]. See Section 14.

Crossrefs

Cf. A259698, A000682.

Sequence in context: A141799 A093969 A259699 * A213439 A006177 A148788

Adjacent sequences: A259697 A259698 A259699 * A259701 A259702 A259703

Keyword

nonn,more

Author

N. J. A. Sloane, Jul 05 2015

Extensions

Corrected and extended by Roger Ford, Jul 13 2016

Status

approved