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, 0, 1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
A149434
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, 0, 1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =46a(5) =164a(6) =606a(7) =2239a(8) =8472a(9) =31920a(10) =122158a(11) =466494a(12) =1797288a(13) =6923488a(14) =26811944a(15) =103876331a(16) =403901878a(17) =1571264580a(18) =6128614886a(19) =23917209854a(20) =93517065586a(21) =365867191042
External references
- oeis: A149434