Triangle read by rows: for 0 <= k < n, a(n, k) is the sum of the products of all subsets of {n-k, n-k+1, ..., n} with k members.
A093905
Triangle read by rows: for 0 <= k < n, a(n, k) is the sum of the products of all subsets of {n-k, n-k+1, ..., n} with k members.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =1a(4) =5a(5) =11a(6) =1a(7) =7a(8) =26a(9) =50a(10) =1a(11) =9a(12) =47a(13) =154a(14) =274a(15) =1a(16) =11a(17) =74a(18) =342a(19) =1044a(20) =1764a(21) =1a(22) =13a(23) =107a(24) =638a(25) =2754a(26) =8028a(27) =13068a(28) =1a(29) =15
External references
- oeis: A093905