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), (0, 0, -1), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
A149076
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), (0, 0, -1), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =7a(4) =28a(5) =62a(6) =258a(7) =669a(8) =2872a(9) =8202a(10) =35902a(11) =109484a(12) =486544a(13) =1558474a(14) =7007624a(15) =23310931a(16) =105792634a(17) =362683186a(18) =1658516164a(19) =5827726534a(20) =26818213980a(21) =96192530864a(22) =445026604190
External references
- oeis: A149076