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

A297853

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

Terms

    a(0) =1a(1) =7a(2) =15a(3) =19a(4) =21a(5) =33a(6) =53a(7) =77a(8) =111a(9) =171a(10) =269a(11) =415a(12) =643a(13) =1013a(14) =1605a(15) =2543a(16) =4041a(17) =6451a(18) =10325a(19) =16547a(20) =26561a(21) =42705a(22) =68741a(23) =110743a(24) =178545a(25) =288053a(26) =464971a(27) =750861a(28) =1212959a(29) =1960023

External references