Number of nX7 0..1 arrays with every element unequal to 1, 2, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

A305181

Number of nX7 0..1 arrays with every element unequal to 1, 2, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =22a(2) =49a(3) =71a(4) =140a(5) =836a(6) =1750a(7) =5407a(8) =19965a(9) =44251a(10) =150549a(11) =488420a(12) =1217938a(13) =3981440a(14) =12553050a(15) =34234337a(16) =106068538a(17) =331125859a(18) =954603491a(19) =2861242231a(20) =8832265881a(21) =26265684299a(22) =77767182950a(23) =237076601097a(24) =715625119985

External references