Triangle read by rows: T(n,k) is the number of partitions of the set {1,2,...,n} having k adjacent blocks of size 2, i.e., blocks of the form (i,i+1) (0 <= k <= floor(n/2)).
A184174
Triangle read by rows: T(n,k) is the number of partitions of the set {1,2,...,n} having k adjacent blocks of size 2, i.e., blocks of the form (i,i+1) (0 <= k <= floor(n/2)).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =2a(6) =10a(7) =4a(8) =1a(9) =35a(10) =14a(11) =3a(12) =139a(13) =54a(14) =9a(15) =1a(16) =611a(17) =224a(18) =38a(19) =4a(20) =2925a(21) =1027a(22) =171a(23) =16a(24) =1a(25) =15128a(26) =5112a(27) =822a(28) =80a(29) =5
External references
- oeis: A184174