Number of (n+1) X (2+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0111.
A259244
Number of (n+1) X (2+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0111.
Terms
- a(0) =21a(1) =65a(2) =192a(3) =581a(4) =1733a(5) =5216a(6) =15613a(7) =46897a(8) =140568a(9) =421901a(10) =1265269a(11) =3796472a(12) =11387877a(13) =34165857a(14) =102492080a(15) =307483605a(16) =922431077a(17) =2767317200a(18) =8301880013a(19) =24905716177a(20) =74716886152a(21) =224150891421a(22) =672451700885
External references
- oeis: A259244