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, 0), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.
A148316
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, 0), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =39a(6) =124a(7) =400a(8) =1358a(9) =4680a(10) =16821a(11) =60975a(12) =227420a(13) =854978a(14) =3284367a(15) =12695918a(16) =49903145a(17) =197196052a(18) =789692499a(19) =3176716632a(20) =12918607435a(21) =52741268340a(22) =217271153314a(23) =898126282267
External references
- oeis: A148316