Number of nX5 0..1 arrays with each 1 adjacent to 3 or 6 king-move neighboring 1s.

Terms

a(0) =1a(1) =6a(2) =13a(3) =23a(4) =68a(5) =162a(6) =343a(7) =864a(8) =2075a(9) =4715a(10) =11332a(11) =27032a(12) =63289a(13) =150185a(14) =356088a(15) =845066a(16) =2001445a(17) =4729763a(18) =11313308a(19) =26839052a(20) =63348543a(21) =152575504a(22) =363231490a(23) =857562898a(24) =2082301478a(25) =4983700747a(26) =11785221680a(27) =28919297267a(28) =69747046028