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), (-1, 0, 1), (0, 1, 1), (1, -1, -1)}.
A148219
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), (-1, 0, 1), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =31a(6) =94a(7) =288a(8) =926a(9) =2825a(10) =9585a(11) =31892a(12) =107072a(13) =367188a(14) =1294572a(15) =4485179a(16) =15867187a(17) =56948876a(18) =204175529a(19) =735284583a(20) =2691436678a(21) =9843320147a(22) =36063481491a(23) =133499289020a(24) =495982477551
External references
- oeis: A148219