Number of slanted n X 5 (i=1..n) X (j=i..5+i-1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 3 neighbors with the same value.

A165382

Number of slanted n X 5 (i=1..n) X (j=i..5+i-1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 3 neighbors with the same value.

Terms

    a(0) =105a(1) =1382a(2) =6412a(3) =18900a(4) =40058a(5) =70658a(6) =110364a(7) =159322a(8) =217548a(9) =284834a(10) =361612a(11) =447194a(12) =542556a(13) =646402a(14) =760380a(15) =882458a(16) =1015084a(17) =1155362a(18) =1306668a(19) =1465114a(20) =1635132a(21) =1811714a(22) =2000476a(23) =2195162a(24) =2402700a(25) =2615458a(26) =2841804a(27) =3072602a(28) =3317788

External references