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, 0)}.
A149860
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, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =13a(4) =38a(5) =127a(6) =439a(7) =1561a(8) =5673a(9) =21144a(10) =81137a(11) =314145a(12) =1232603a(13) =4909110a(14) =19728702a(15) =80154126a(16) =327820102a(17) =1350493841a(18) =5610705828a(19) =23416574546a(20) =98304768279a(21) =414909948960
External references
- oeis: A149860