Number of nX4 0..1 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..1 introduced in row major order.
A240652
Number of nX4 0..1 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..1 introduced in row major order.
Terms
- a(0) =1a(1) =3a(2) =17a(3) =91a(4) =352a(5) =1545a(6) =7154a(7) =33269a(8) =154974a(9) =724237a(10) =3394852a(11) =15935126a(12) =74854028a(13) =351802659a(14) =1653966146a(15) =7777530146a(16) =36577083726a(17) =172031838421a(18) =809149353515
External references
- oeis: A240652