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, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
A149718
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, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =73a(5) =285a(6) =1261a(7) =5271a(8) =23587a(9) =102053a(10) =460957a(11) =2036503a(12) =9262479a(13) =41492757a(14) =189763421a(15) =858506359a(16) =3943961111a(17) =17975054413a(18) =82886296621a(19) =379938499629
External references
- oeis: A149718