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, 1), (1, 0, -1), (1, 1, 1)}.
A149708
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, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =71a(5) =275a(6) =1197a(7) =5015a(8) =22283a(9) =96237a(10) =432479a(11) =1908495a(12) =8659109a(13) =38763863a(14) =177016943a(15) =800411443a(16) =3674033371a(17) =16740426241a(18) =77162216045a(19) =353660756327
External references
- oeis: A149708