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), (0, 0, 1), (0, 1, 0), (1, 0, 0)}.
A151031
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), (0, 0, 1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =3a(2) =9a(3) =29a(4) =105a(5) =401a(6) =1549a(7) =6117a(8) =24863a(9) =102513a(10) =425667a(11) =1788859a(12) =7605783a(13) =32534495a(14) =139913313a(15) =606044139a(16) =2640192189a(17) =11543795319a(18) =50681045899a(19) =223505643799a(20) =988925201653
External references
- oeis: A151031