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, 1, -1), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
A149168
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, 1, -1), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =42a(5) =130a(6) =590a(7) =2065a(8) =9590a(9) =36246a(10) =169302a(11) =662508a(12) =3151302a(13) =12716418a(14) =60766134a(15) =249975297a(16) =1204668894a(17) =5046138526a(18) =24387184250a(19) =103327379584a(20) =502209024746
External references
- oeis: A149168