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, 0, 0), (-1, 0, 1), (0, -1, 1), (0, 1, -1), (1, 1, 0)}.
A149439
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, 0, 0), (-1, 0, 1), (0, -1, 1), (0, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =46a(5) =182a(6) =725a(7) =2951a(8) =12485a(9) =52914a(10) =228114a(11) =995861a(12) =4367993a(13) =19347215a(14) =86182865a(15) =385719242a(16) =1735798572a(17) =7840344400a(18) =35542086947a(19) =161680035938a(20) =737477049496
External references
- oeis: A149439