Number of nX3 0..1 arrays with every element unequal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

A303883

Number of nX3 0..1 arrays with every element unequal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =8a(2) =11a(3) =36a(4) =87a(5) =256a(6) =684a(7) =1932a(8) =5308a(9) =14809a(10) =41025a(11) =114088a(12) =316733a(13) =880136a(14) =2444724a(15) =6792145a(16) =18868672a(17) =52420409a(18) =145629432a(19) =404580097a(20) =1123976982a(21) =3122570154a(22) =8674939898a(23) =24100237936a(24) =66953936965a(25) =186007780911a(26) =516756709968

External references