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, 0), (-1, 0, 0), (1, -1, -1), (1, 0, 1), (1, 1, -1)}.
A148827
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, 0), (-1, 0, 0), (1, -1, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =27a(5) =85a(6) =309a(7) =1081a(8) =4049a(9) =14846a(10) =57700a(11) =220417a(12) =868886a(13) =3391316a(14) =13641655a(15) =54422537a(16) =221000582a(17) =892890628a(18) =3671515220a(19) =15034249963a(20) =62252763685a(21) =257099572289
External references
- oeis: A148827