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), (-1, 0, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
A149070
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), (-1, 0, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =11a(4) =42a(5) =175a(6) =755a(7) =3318a(8) =14897a(9) =67934a(10) =313320a(11) =1457186a(12) =6834042a(13) =32249951a(14) =152963363a(15) =728772478a(16) =3485974666a(17) =16728898237a(18) =80509755123a(19) =388466875840
External references
- oeis: A149070