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, 0, 0), (0, 0, 1), (0, 1, 1), (1, 0, -1), (1, 1, -1)}.
A150723
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, 0, 0), (0, 0, 1), (0, 1, 1), (1, 0, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =28a(4) =120a(5) =496a(6) =2192a(7) =9696a(8) =44032a(9) =201088a(10) =931328a(11) =4337664a(12) =20361728a(13) =96076800a(14) =455638016a(15) =2169294848a(16) =10367574016a(17) =49699209216a(18) =238916157440
External references
- oeis: A150723