Number of nX6 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value increasing by 0 or 1 with every step right, diagonally se or down.
A253009
Number of nX6 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value increasing by 0 or 1 with every step right, diagonally se or down.
Terms
- a(0) =10a(1) =85a(2) =632a(3) =3423a(4) =14795a(5) =54219a(6) =2327062a(7) =43197859a(8) =395069496a(9) =2063349297a(10) =7250116841a(11) =19242081848a(12) =41884052188a(13) =79190458776a(14) =135212633776a(15) =214009464108a(16) =319640931500a(17) =456167117868a(18) =627648109484a(19) =838143992620
External references
- oeis: A253009