Number of set partitions of [n] with minimal block length multiplicity equal to one.
A271426
Number of set partitions of [n] with minimal block length multiplicity equal to one.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =4a(4) =11a(5) =51a(6) =132a(7) =771a(8) =3089a(9) =18388a(10) =96423a(11) =627529a(12) =3349018a(13) =24510305a(14) =155908651a(15) =1171494200a(16) =8647906143a(17) =71603237483a(18) =572103586280
External references
- oeis: A271426