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, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150390
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, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =89a(5) =330a(6) =1275a(7) =4877a(8) =19070a(9) =74212a(10) =292166a(11) =1147845a(12) =4537572a(13) =17923038a(14) =71069941a(15) =281673376a(16) =1119180841a(17) =4445898817a(18) =17690888432a(19) =70390284589a(20) =280390365698
External references
- oeis: A150390