Number of n X n 0..1 arrays with every element equal to 1, 2, 4 or 7 king-move adjacent elements, with upper left element zero.
A298088
Number of n X n 0..1 arrays with every element equal to 1, 2, 4 or 7 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =3a(2) =15a(3) =30a(4) =45a(5) =171a(6) =229a(7) =417a(8) =822a(9) =1359a(10) =1993a(11) =5049a(12) =3669a(13) =7878a(14) =33158a(15) =16734a(16) =37752a(17) =734240a(18) =160344a(19) =389218a(20) =50665319a(21) =1735920a(22) =6661033
External references
- oeis: A298088