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), (-1, 0, 1), (0, 0, 1), (1, 1, -1), (1, 1, 1)}.
A150857
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), (-1, 0, 1), (0, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =142a(5) =626a(6) =2880a(7) =13252a(8) =62178a(9) =292358a(10) =1388980a(11) =6614360a(12) =31693270a(13) =152181850a(14) =733673768a(15) =3543512172a(16) =17162220682a(17) =83250135150a(18) =404649688540
External references
- oeis: A150857