Number of nX4 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero.

A304226

Number of nX4 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =5a(2) =6a(3) =11a(4) =20a(5) =46a(6) =97a(7) =189a(8) =395a(9) =836a(10) =1701a(11) =3492a(12) =7284a(13) =15033a(14) =30913a(15) =63989a(16) =132350a(17) =272947a(18) =563756a(19) =1165374a(20) =2406457a(21) =4969281a(22) =10266751a(23) =21207248a(24) =43798629a(25) =90470888a(26) =186881300a(27) =385997321a(28) =797284757a(29) =1646862265

External references