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, 0, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
A148410
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, 0, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =56a(6) =204a(7) =779a(8) =3083a(9) =12542a(10) =51867a(11) =218851a(12) =937428a(13) =4066279a(14) =17819039a(15) =78771159a(16) =351148071a(17) =1576762625a(18) =7124754861a(19) =32369976554a(20) =147797541104a(21) =677966771333
External references
- oeis: A148410