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), (0, 0, 1), (1, 0, 1), (1, 1, -1)}.
A150569
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), (0, 0, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =108a(5) =452a(6) =1994a(7) =8845a(8) =40271a(9) =184235a(10) =855223a(11) =3985965a(12) =18744281a(13) =88440574a(14) =419747961a(15) =1997680208a(16) =9546471924a(17) =45725577789a(18) =219672576950
External references
- oeis: A150569