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, 1, 1), (1, 0, 0), (1, 0, 1)}.
A151126
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, 1, 1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =195a(5) =861a(6) =3883a(7) =17849a(8) =82871a(9) =387677a(10) =1828331a(11) =8675753a(12) =41340895a(13) =197798741a(14) =949965235a(15) =4575464321a(16) =22091621351a(17) =106919166509a(18) =518529548539
External references
- oeis: A151126