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), (-1, 1, 1), (1, -1, 1), (1, 0, -1), (1, 0, 1)}.
A149407
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), (-1, 1, 1), (1, -1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =52a(5) =190a(6) =855a(7) =3448a(8) =15875a(9) =67678a(10) =316366a(11) =1396314a(12) =6597636a(13) =29809522a(14) =141975693a(15) =652322186a(16) =3125882456a(17) =14543234380a(18) =70027024190a(19) =328968821688
External references
- oeis: A149407