Number of n X 7 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.

A253222

Number of n X 7 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) =15a(1) =81a(2) =504a(3) =3140a(4) =16028a(5) =47698a(6) =47698a(7) =649712a(8) =2913793a(9) =7415837a(10) =14420585a(11) =24015795a(12) =36221327a(13) =51039931a(14) =68471783a(15) =88516883a(16) =111175231a(17) =136446827a(18) =164331671a(19) =194829763a(20) =227941103a(21) =263665691a(22) =302003527a(23) =342954611a(24) =386518943

External references