Number of n X 6 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value within 2 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.
A253221
Number of n X 6 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value within 2 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.
Terms
- a(0) =10a(1) =49a(2) =263a(3) =1249a(4) =3568a(5) =3568a(6) =47698a(7) =213155a(8) =538444a(9) =1039060a(10) =1719174a(11) =2579462a(12) =3619974a(13) =4840710a(14) =6241670a(15) =7822854a(16) =9584262a(17) =11525894a(18) =13647750a(19) =15949830a(20) =18432134a(21) =21094662a(22) =23937414a(23) =26960390a(24) =30163590a(25) =33547014a(26) =37110662a(27) =40854534
External references
- oeis: A253221