Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (0, 1, -1), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
A150728
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (0, 1, -1), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =28a(4) =126a(5) =524a(6) =2356a(7) =10660a(8) =48830a(9) =226132a(10) =1061284a(11) =4986156a(12) =23637740a(13) =112621728a(14) =537913296a(15) =2580704988a(16) =12424532670a(17) =59913275180a(18) =289768069756
External references
- oeis: A150728