Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k horizontal steps in the valleys (n>=2, k>=0).
A278134
Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k horizontal steps in the valleys (n>=2, k>=0).
Terms
- a(0) =1a(1) =2a(2) =5a(3) =13a(4) =34a(5) =1a(6) =89a(7) =7a(8) =1a(9) =233a(10) =34a(11) =7a(12) =1a(13) =610a(14) =141a(15) =35a(16) =7a(17) =1a(18) =1597a(19) =534a(20) =152a(21) =36a(22) =7a(23) =1a(24) =4181a(25) =1905a(26) =611a(27) =163a(28) =37a(29) =7
External references
- oeis: A278134