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), (-1, 1, 0), (1, -1, -1), (1, 1, 0)}.
A149088
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), (-1, 1, 0), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =7a(4) =30a(5) =75a(6) =323a(7) =927a(8) =4084a(9) =12757a(10) =57357a(11) =190323a(12) =863932a(13) =2990215a(14) =13742390a(15) =49151253a(16) =227407578a(17) =834395673a(18) =3888507313a(19) =14572098227a(20) =68261017116a(21) =260231521603
External references
- oeis: A149088