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, 1), (0, 0, 1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
A151187
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, 1), (0, 0, 1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =51a(4) =229a(5) =1057a(6) =4973a(7) =23707a(8) =114084a(9) =552863a(10) =2693562a(11) =13177746a(12) =64682128a(13) =318329991a(14) =1570030555a(15) =7757317348a(16) =38384755215a(17) =190172212694a(18) =943178242919
External references
- oeis: A151187