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, 1, -1), (0, 0, -1), (1, -1, 1), (1, 0, 1)}.
A148635
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, 1, -1), (0, 0, -1), (1, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =22a(5) =61a(6) =221a(7) =715a(8) =2631a(9) =9410a(10) =35256a(11) =133053a(12) =509705a(13) =1985164a(14) =7789874a(15) =30950573a(16) =124019573a(17) =500123818a(18) =2037158956a(19) =8323345250a(20) =34325148556a(21) =141934974210a(22) =590948181102
External references
- oeis: A148635