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, -1, 1), (-1, 1, -1), (0, 0, 1), (1, 0, 0)}.
A149816
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, -1, 1), (-1, 1, -1), (0, 0, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =26a(5) =76a(6) =248a(7) =810a(8) =2710a(9) =9186a(10) =31999a(11) =115123a(12) =418274a(13) =1533038a(14) =5654034a(15) =21106525a(16) =79847876a(17) =304224378a(18) =1165021705a(19) =4480513435a(20) =17346259036a(21) =67616557623a(22) =264822472424
External references
- oeis: A149816