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, 1), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, 1, 0)}.
A150845
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, 1), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =139a(5) =618a(6) =2815a(7) =13017a(8) =60855a(9) =287001a(10) =1362415a(11) =6502201a(12) =31167650a(13) =149934312a(14) =723476714a(15) =3499963998a(16) =16969632025a(17) =82436773668a(18) =401150765071
External references
- oeis: A150845