A259700 - OEIS

%I #14 Jul 13 2020 06:25:03

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

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

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

%H Albert Sade, <a href="/A000108/a000108_17.pdf">Sur les Chevauchements des Permutations</a>, published by the author, Marseille, 1949. [Annotated scanned copy]. See Section 14.

%Y Cf. A259698, A000682.

%K nonn,more

%O 2,2

%A _N. J. A. Sloane_, Jul 05 2015

%E Corrected and extended by _Roger Ford_, Jul 13 2016