Number of nX7 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 3 or 6 neighboring 1s.

A296553

Number of nX7 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 3 or 6 neighboring 1s.

Terms

    a(0) =1a(1) =1a(2) =7a(3) =17a(4) =34a(5) =62a(6) =148a(7) =347a(8) =786a(9) =1702a(10) =3761a(11) =8400a(12) =18843a(13) =41959a(14) =93233a(15) =207359a(16) =462209a(17) =1030065a(18) =2293768a(19) =5106282a(20) =11371588a(21) =25328516a(22) =56410914a(23) =125623824a(24) =279760971a(25) =623046005a(26) =1387574808a(27) =3090202195a(28) =6882002941a(29) =15326533700

External references