Triangle read by rows: T(n,k) is the number of 2-compositions of n having k columns with increasing entries (0<=k<=n).

A181304

Triangle read by rows: T(n,k) is the number of 2-compositions of n having k columns with increasing entries (0<=k<=n).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =1a(6) =7a(7) =11a(8) =5a(9) =1a(10) =18a(11) =33a(12) =23a(13) =7a(14) =1a(15) =44a(16) =100a(17) =87a(18) =39a(19) =9a(20) =1a(21) =110a(22) =288a(23) =310a(24) =177a(25) =59a(26) =11a(27) =1a(28) =272a(29) =820

External references