Array read by downward antidiagonals: A(n,k) = Sum_{j=0..k + (k mod 3) + 1} A(n-1,j) with A(0,k) = 1, n >= 0, k >= 0.
A369518
Array read by downward antidiagonals: A(n,k) = Sum_{j=0..k + (k mod 3) + 1} A(n-1,j) with A(0,k) = 1, n >= 0, k >= 0.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =4a(5) =6a(6) =1a(7) =6a(8) =17a(9) =23a(10) =1a(11) =5a(12) =33a(13) =80a(14) =103a(15) =1a(16) =7a(17) =24a(18) =184a(19) =408a(20) =511a(21) =1a(22) =9a(23) =41a(24) =121a(25) =1054a(26) =2208a(27) =2719a(28) =1a(29) =8
External references
- oeis: A369518