Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

A299010

Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =13a(2) =20a(3) =44a(4) =123a(5) =343a(6) =957a(7) =2710a(8) =7749a(9) =22170a(10) =63434a(11) =181941a(12) =521609a(13) =1495695a(14) =4290128a(15) =12304541a(16) =35291808a(17) =101228002a(18) =290349737a(19) =832808429a(20) =2388749945a(21) =6851656946a(22) =19652642153a(23) =56369797674a(24) =161685824712a(25) =463764471339

External references