Triangle read by rows: T(n,k) is the number of 2-compositions of n having k odd entries (0<=k<=n) A 2-composition of n is a nonnegative matrix with two rows, such that each column has at least one nonzero entry and whose entries sum up to n.
A181295
Triangle read by rows: T(n,k) is the number of 2-compositions of n having k odd entries (0<=k<=n) A 2-composition of n is a nonnegative matrix with two rows, such that each column has at least one nonzero entry and whose entries sum up to n.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =2a(4) =0a(5) =5a(6) =0a(7) =12a(8) =0a(9) =12a(10) =7a(11) =0a(12) =46a(13) =0a(14) =29a(15) =0a(16) =58a(17) =0a(18) =152a(19) =0a(20) =70a(21) =24a(22) =0a(23) =297a(24) =0a(25) =466a(26) =0a(27) =169a(28) =0a(29) =256
External references
- oeis: A181295