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), (-1, 1, 0), (0, 0, 1), (1, 0, 0)}.
A150042
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), (-1, 1, 0), (0, 0, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =58a(5) =198a(6) =699a(7) =2555a(8) =9496a(9) =35858a(10) =137357a(11) =532718a(12) =2088905a(13) =8261370a(14) =32902004a(15) =131899705a(16) =531966574a(17) =2157304467a(18) =8790642741a(19) =35967722498a(20) =147723568543a(21) =608879673427
External references
- oeis: A150042