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, 1, -1), (0, 0, 1), (1, 0, 1), (1, 1, 0)}.
A151120
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, 1, -1), (0, 0, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =193a(5) =856a(6) =3887a(7) =17918a(8) =83588a(9) =393363a(10) =1864001a(11) =8881668a(12) =42512504a(13) =204252658a(14) =984469664a(15) =4757879335a(16) =23048473921a(17) =111881018651a(18) =544062911646
External references
- oeis: A151120