Self-convolution of numbers of preferential arrangements.

A006957

Self-convolution of numbers of preferential arrangements.

Terms

    a(0) =1a(1) =2a(2) =7a(3) =32a(4) =185a(5) =1310a(6) =11067a(7) =109148a(8) =1234045a(9) =15752858a(10) =224169407a(11) =3518636504a(12) =60381131265

External references