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), (1, -1, -1), (1, 1, 1)}.
A150360
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), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =91a(5) =356a(6) =1539a(7) =6480a(8) =28889a(9) =126434a(10) =576947a(11) =2590993a(12) =11989999a(13) =54775872a(14) =256245755a(15) =1185913057a(16) =5591577819a(17) =26128381390a(18) =123978976983a(19) =583822539279
External references
- oeis: A150360