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), (0, 0, 1), (1, 0, -1)}.
A148183
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), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =29a(6) =93a(7) =276a(8) =927a(9) =2993a(10) =10274a(11) =35085a(12) =124049a(13) =441427a(14) =1598897a(15) =5826945a(16) =21522467a(17) =79877563a(18) =300000944a(19) =1131616252a(20) =4305887660a(21) =16454197869a(22) =63243671694a(23) =244290538010a(24) =947770308248
External references
- oeis: A148183