1/8 the number of (n+1)X3 0..3 arrays with all 2X2 subblock sums the same.
A184022
1/8 the number of (n+1)X3 0..3 arrays with all 2X2 subblock sums the same.
Terms
- a(0) =88a(1) =204a(2) =491a(3) =1347a(4) =3781a(5) =11541a(6) =35771a(7) =117321a(8) =389053a(9) =1343649a(10) =4678331a(11) =16789497a(12) =60610141a(13) =223849641a(14) =830159051a(15) =3132039921a(16) =11849473693a(17) =45412071969a(18) =174350721371a(19) =675875378697
External references
- oeis: A184022