Number of n X 4 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value within 3 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.
A253000
Number of n X 4 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value within 3 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) =1a(1) =1a(2) =1a(3) =1a(4) =69a(5) =1132a(6) =7235a(7) =25233a(8) =63135a(9) =129133a(10) =231419a(11) =378185a(12) =577623a(13) =837925a(14) =1167283a(15) =1573889a(16) =2065935a(17) =2651613a(18) =3339115a(19) =4136633a(20) =5052359a(21) =6094485a(22) =7271203a(23) =8590705a(24) =10061183a(25) =11690829a(26) =13487835a(27) =15460393a(28) =17616695a(29) =19964933
External references
- oeis: A253000