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), (0, 0, 1), (1, -1, 0), (1, 0, 0)}.
A149828
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), (0, 0, 1), (1, -1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =28a(5) =85a(6) =282a(7) =947a(8) =3278a(9) =11804a(10) =42992a(11) =160394a(12) =608956a(13) =2332267a(14) =9090053a(15) =35744068a(16) =141703215a(17) =568391420a(18) =2292523599a(19) =9317832473a(20) =38156420126a(21) =156926908434a(22) =649714165554
External references
- oeis: A149828