Number of 3Xn 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303041
Number of 3Xn 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =6a(2) =14a(3) =28a(4) =56a(5) =150a(6) =360a(7) =828a(8) =1906a(9) =4628a(10) =10972a(11) =25850a(12) =60948a(13) =145152a(14) =343870a(15) =814072a(16) =1927632a(17) =4573086a(18) =10836712a(19) =25678860a(20) =60851842a(21) =144253956a(22) =341881772a(23) =810275098a(24) =1920403380a(25) =4551789280a(26) =10788216718a(27) =25569422984a(28) =60602792000
External references
- oeis: A303041