Number of nX7 0..1 arrays with every element equal to 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

A298887

Number of nX7 0..1 arrays with every element equal to 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =95a(2) =63a(3) =240a(4) =444a(5) =814a(6) =1818a(7) =3663a(8) =7496a(9) =16544a(10) =33596a(11) =70466a(12) =148451a(13) =311053a(14) =653252a(15) =1372584a(16) =2873709a(17) =6036087a(18) =12668750a(19) =26606071a(20) =55876191a(21) =117364939a(22) =246515244a(23) =517702247a(24) =1087644299a(25) =2284968402a(26) =4799996646a(27) =10083584000

External references