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), (0, 0, -1), (1, -1, 1), (1, 1, 0)}.
A149277
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), (0, 0, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =42a(5) =154a(6) =612a(7) =2465a(8) =10171a(9) =42692a(10) =181338a(11) =780134a(12) =3384561a(13) =14814551a(14) =65278098a(15) =289414959a(16) =1290151950a(17) =5776944067a(18) =25982897662a(19) =117268906634a(20) =531182757836
External references
- oeis: A149277