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), (0, -1, 0), (0, 1, 1), (1, -1, -1)}.
A148536
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), (0, -1, 0), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =19a(5) =45a(6) =161a(7) =457a(8) =1571a(9) =5133a(10) =17379a(11) =60455a(12) =208771a(13) =742011a(14) =2650483a(15) =9470073a(16) =34792573a(17) =125775751a(18) =467624763a(19) =1722320273a(20) =6418015101a(21) =24102740527a(22) =90119100729a(23) =342401562717
External references
- oeis: A148536