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, 0), (0, -1, 1), (1, -1, 0), (1, 1, 0)}.
A149238
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, 0), (0, -1, 1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =36a(5) =125a(6) =435a(7) =1595a(8) =5954a(9) =22465a(10) =86223a(11) =334795a(12) =1315848a(13) =5206019a(14) =20773532a(15) =83318857a(16) =336730400a(17) =1367649633a(18) =5578371219a(19) =22851417683a(20) =93958046678a(21) =387906668755
External references
- oeis: A149238