Number of 3 X n 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302324
Number of 3 X n 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =25a(2) =65a(3) =177a(4) =519a(5) =1528a(6) =4509a(7) =13329a(8) =39609a(9) =117981a(10) =351994a(11) =1051660a(12) =3146513a(13) =9424435a(14) =28252647a(15) =84757174a(16) =254424013a(17) =764109856a(18) =2295781145a(19) =6900025071a(20) =20743913296a(21) =62377653458a(22) =187606559148a(23) =564330015524
External references
- oeis: A302324