Number of (2+1)X(n+1) 0..3 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..3 introduced in row major order.
A231452
Number of (2+1)X(n+1) 0..3 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..3 introduced in row major order.
Terms
- a(0) =6a(1) =15a(2) =32a(3) =87a(4) =229a(5) =647a(6) =1829a(7) =5293a(8) =15405a(9) =45267a(10) =133622a(11) =396229a(12) =1178280a(13) =3512183a(14) =10486280a(15) =31348643a(16) =93802627a(17) =280872905a(18) =841438827a(19) =2521717541a(20) =7559421071a(21) =22665628739a(22) =67969023714a(23) =203845636065a(24) =611401428290
External references
- oeis: A231452