Number of minimal covers of an (n + 1)-set by a collection of n nonempty subsets, a(n) = A035348(n,n-1).

A003469

Number of minimal covers of an (n + 1)-set by a collection of n nonempty subsets, a(n) = A035348(n,n-1).

Terms

    a(0) =1a(1) =6a(2) =22a(3) =65a(4) =171a(5) =420a(6) =988a(7) =2259a(8) =5065a(9) =11198a(10) =24498a(11) =53157a(12) =114583a(13) =245640a(14) =524152a(15) =1113959a(16) =2359125a(17) =4980546a(18) =10485550a(19) =22019865a(20) =46137091a(21) =96468716a(22) =201326292a(23) =419430075a(24) =872414881a(25) =1811938950a(26) =3758095978a(27) =7784627789a(28) =16106126895a(29) =33285996048

External references