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), (-1, 0, 1), (1, -1, -1), (1, 1, 0)}.
A148566
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), (-1, 0, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =19a(5) =48a(6) =162a(7) =452a(8) =1584a(9) =4729a(10) =16827a(11) =52753a(12) =189702a(13) =614440a(14) =2230759a(15) =7396383a(16) =27046529a(17) =91353592a(18) =335757786a(19) =1151174868a(20) =4247908189a(21) =14740740454a(22) =54577193096a(23) =191263827200a(24) =710131834614
External references
- oeis: A148566