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, 0), (0, 0, 1), (1, 0, -1)}.
A148293
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, 0), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =35a(6) =109a(7) =335a(8) =1081a(9) =3640a(10) =12356a(11) =43192a(12) =153588a(13) =552741a(14) =2023770a(15) =7484083a(16) =27974294a(17) =105662926a(18) =402081552a(19) =1543075131a(20) =5962438750a(21) =23183912562a(22) =90707739797a(23) =356731022840
External references
- oeis: A148293