Number of nX3 0..1 arrays with every element unequal to 0, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

A304947

Number of nX3 0..1 arrays with every element unequal to 0, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =7a(2) =13a(3) =21a(4) =29a(5) =58a(6) =120a(7) =250a(8) =515a(9) =1100a(10) =2302a(11) =4973a(12) =10539a(13) =22512a(14) =48417a(15) =103240a(16) =222483a(17) =476629a(18) =1023567a(19) =2201683a(20) =4721852a(21) =10159934a(22) =21815950a(23) =46884155a(24) =100796318a(25) =216507106a(26) =465528729a(27) =1000276465a(28) =2149938118a(29) =4621346273

External references