Number of nX1 0..2 arrays with no more than floor(nX1/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
A222848
Number of nX1 0..2 arrays with no more than floor(nX1/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =10a(4) =24a(5) =72a(6) =168a(7) =664a(8) =1632a(9) =5376a(10) =13152a(11) =47968a(12) =119936a(13) =406400a(14) =1017984a(15) =3585408a(16) =9082368a(17) =30987264a(18) =78761472a(19) =272565760a(20) =697493504a(21) =2378450944a(22) =6107523072a(23) =20921604096a(24) =53972262912a(25) =183506403328a(26) =474876108800
External references
- oeis: A222848