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, 1), (-1, 0, 1), (-1, 1, -1), (1, 0, 0)}.
A148008
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, 1), (-1, 0, 1), (-1, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =15a(6) =44a(7) =91a(8) =328a(9) =759a(10) =2636a(11) =6215a(12) =23704a(13) =59033a(14) =220830a(15) =556591a(16) =2236464a(17) =5852471a(18) =22914792a(19) =60201671a(20) =249117796a(21) =672658877a(22) =2717264406a(23) =7345845087a(24) =31036174078a(25) =85697043495a(26) =353999837354a(27) =977097682671
External references
- oeis: A148008