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, 1, -1), (-1, 1, 1), (1, -1, 1), (1, 0, 0)}.
A148277
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, 1, -1), (-1, 1, 1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =15a(5) =40a(6) =166a(7) =515a(8) =2213a(9) =7369a(10) =32560a(11) =114093a(12) =515590a(13) =1880721a(14) =8638894a(15) =32478869a(16) =150899429a(17) =580640925a(18) =2720303557a(19) =10663729858a(20) =50290667187a(21) =200199156959a(22) =949308160772
External references
- oeis: A148277