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, -1, 0), (-1, 1, -1), (1, 0, 1), (1, 1, -1)}.
A148654
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, -1, 0), (-1, 1, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =24a(5) =64a(6) =234a(7) =753a(8) =2814a(9) =9631a(10) =36590a(11) =133154a(12) =508094a(13) =1892979a(14) =7412897a(15) =28214787a(16) =110971333a(17) =430260008a(18) =1715691772a(19) =6714923487a(20) =26987686029a(21) =107015958439a(22) =432609065273
External references
- oeis: A148654