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), (0, 1, -1), (1, 0, 1)}.
A150036
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), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =17a(4) =63a(5) =222a(6) =868a(7) =3265a(8) =13405a(9) =53275a(10) =223259a(11) =914164a(12) =3909764a(13) =16388698a(14) =70927944a(15) =302334626a(16) =1322634824a(17) =5711521875a(18) =25182959651a(19) =109885961160a(20) =487770976428
External references
- oeis: A150036