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), (-1, 1, 0), (0, -1, 1), (0, 1, -1), (1, 0, 1)}.
A149448
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), (-1, 1, 0), (0, -1, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =48a(5) =186a(6) =753a(7) =3097a(8) =13053a(9) =55769a(10) =241140a(11) =1053164a(12) =4636881a(13) =20557358a(14) =91675021a(15) =410927024a(16) =1850129497a(17) =8362763763a(18) =37932271619a(19) =172592759713a(20) =787505869111
External references
- oeis: A149448