Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

A306161

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =5a(2) =17a(3) =32a(4) =77a(5) =207a(6) =523a(7) =1304a(8) =3307a(9) =8414a(10) =21308a(11) =53961a(12) =136813a(13) =346873a(14) =879204a(15) =2228553a(16) =5649254a(17) =14320348a(18) =36300091a(19) =92016267a(20) =233250975a(21) =591264096a(22) =1498784411a(23) =3799243014a(24) =9630638220a(25) =24412541681a(26) =61882935885a(27) =156866006985

External references