Triangle read by rows: a(n,k) = number of k-length walks in the Hasse diagram of a Boolean algebra of order n.

A090802

Triangle read by rows: a(n,k) = number of k-length walks in the Hasse diagram of a Boolean algebra of order n.

Terms

    a(0) =1a(1) =2a(2) =1a(3) =4a(4) =4a(5) =2a(6) =8a(7) =12a(8) =12a(9) =6a(10) =16a(11) =32a(12) =48a(13) =48a(14) =24a(15) =32a(16) =80a(17) =160a(18) =240a(19) =240a(20) =120a(21) =64a(22) =192a(23) =480a(24) =960a(25) =1440a(26) =1440a(27) =720a(28) =128a(29) =448

External references