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, 0), (0, 1, 0), (1, -1, 1), (1, 0, -1)}.
A148414
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, 0), (0, 1, 0), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =59a(6) =216a(7) =828a(8) =3247a(9) =13148a(10) =54407a(11) =229188a(12) =980414a(13) =4249191a(14) =18618000a(15) =82359851a(16) =367516576a(17) =1652036464a(18) =7475296190a(19) =34030364687a(20) =155733266535a(21) =716102735681
External references
- oeis: A148414