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), (0, 0, -1), (0, 1, 1), (1, 0, 1)}.
A150504
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), (0, 0, -1), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =102a(5) =413a(6) =1733a(7) =7380a(8) =31942a(9) =139818a(10) =616646a(11) =2741188a(12) =12256906a(13) =55097109a(14) =248807269a(15) =1127810540a(16) =5130534695a(17) =23408654831a(18) =107101683780a(19) =491227236154
External references
- oeis: A150504