Number of nX3 0..2 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
A280310
Number of nX3 0..2 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =0a(1) =15a(2) =788a(3) =20274a(4) =415198a(5) =7506237a(6) =125467047a(7) =1986983748a(8) =30245976536a(9) =446674283782
External references
- oeis: A280310