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, 0), (-1, 0, 1), (0, 1, 0), (1, 0, -1), (1, 0, 0)}.
A149958
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, 0), (-1, 0, 1), (0, 1, 0), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =16a(4) =53a(5) =190a(6) =712a(7) =2748a(8) =10955a(9) =44472a(10) =184169a(11) =774033a(12) =3294304a(13) =14186277a(14) =61653079a(15) =270328574a(16) =1194121104a(17) =5310366701a(18) =23760820194a(19) =106886302347a(20) =483240427871
External references
- oeis: A149958