The number of n X k matrices, k=0..n, with nonnegative integer entries and every row and column sum <=3 . Triangle T(n>=0, 0<=k<=n) read by rows.
A301390
The number of n X k matrices, k=0..n, with nonnegative integer entries and every row and column sum <=3 . Triangle T(n>=0, 0<=k<=n) read by rows.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =1a(4) =10a(5) =70a(6) =1a(7) =20a(8) =316a(9) =3380a(10) =1a(11) =35a(12) =1045a(13) =23259a(14) =344279a(15) =1a(16) =56a(17) =2806a(18) =112976a(19) =3286101a(20) =63241196a(21) =1a(22) =84a(23) =6510a(24) =427440a(25) =21787375a(26) =789333776a(27) =18937075894a(28) =1a(29) =120
External references
- oeis: A301390