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, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.
A149330
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, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =39a(5) =148a(6) =550a(7) =2073a(8) =8163a(9) =32415a(10) =128870a(11) =521964a(12) =2131786a(13) =8718262a(14) =35959256a(15) =149267043a(16) =620741014a(17) =2592823626a(18) =10879365183a(19) =45738855833a(20) =192807224404a(21) =815333606093
External references
- oeis: A149330