Number of n X 3 nonnegative integer arrays with each row and column increasing from zero by 0, 1 or 2.

A202807

Number of n X 3 nonnegative integer arrays with each row and column increasing from zero by 0, 1 or 2.

Terms

    a(0) =1a(1) =6a(2) =32a(3) =121a(4) =356a(5) =881a(6) =1925a(7) =3830a(8) =7083a(9) =12352a(10) =20526a(11) =32759a(12) =50518a(13) =75635a(14) =110363a(15) =157436a(16) =220133a(17) =302346a(18) =408652a(19) =544389a(20) =715736a(21) =929797a(22) =1194689a(23) =1519634a(24) =1915055a(25) =2392676a(26) =2965626a(27) =3648547a(28) =4457706a(29) =5411111

External references