Number of n X 2 0..2 arrays with all horizontally or vertically connected equal values in a straight line, and new values 0..2 introduced in row major order.
A223381
Number of n X 2 0..2 arrays with all horizontally or vertically connected equal values in a straight line, and new values 0..2 introduced in row major order.
Terms
- a(0) =2a(1) =9a(2) =57a(3) =366a(4) =2358a(5) =15204a(6) =98052a(7) =632376a(8) =4078488a(9) =26304144a(10) =169648272a(11) =1094144736a(12) =7056675168a(13) =45511953984a(14) =293528880192
External references
- oeis: A223381