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, 0), (1, 0, 0), (1, 0, 1)}.
A150318
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, 0), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =21a(4) =91a(5) =327a(6) =1470a(7) =5619a(8) =26332a(9) =105906a(10) =501653a(11) =2068164a(12) =9957046a(13) =42029744a(14) =203306113a(15) =869727663a(16) =4241761211a(17) =18392828052a(18) =89932093568a(19) =393252647823
External references
- oeis: A150318