Number of nX4 0..1 arrays with every element equal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300376
Number of nX4 0..1 arrays with every element equal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =10a(2) =11a(3) =26a(4) =80a(5) =237a(6) =692a(7) =2548a(8) =8240a(9) =26808a(10) =92281a(11) =309903a(12) =1039489a(13) =3527966a(14) =11931702a(15) =40287280a(16) =136366907a(17) =461541474a(18) =1560895810a(19) =5282067585a(20) =17874953308a(21) =60478794740a(22) =204650044415a(23) =692516520567
External references
- oeis: A300376