Triangle read by rows: T(n,k) is coefficient of z^n*w^k in 1/(1 - 2*z - 2*w + 2*z*w) read by rows in order 00, 10, 01, 20, 11, 02, ...

A059474

Triangle read by rows: T(n,k) is coefficient of z^n*w^k in 1/(1 - 2*z - 2*w + 2*z*w) read by rows in order 00, 10, 01, 20, 11, 02, ...

Terms

    a(0) =1a(1) =2a(2) =2a(3) =4a(4) =6a(5) =4a(6) =8a(7) =16a(8) =16a(9) =8a(10) =16a(11) =40a(12) =52a(13) =40a(14) =16a(15) =32a(16) =96a(17) =152a(18) =152a(19) =96a(20) =32a(21) =64a(22) =224a(23) =416a(24) =504a(25) =416a(26) =224a(27) =64a(28) =128a(29) =512

External references