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, 0, -1), (-1, 0, 1), (1, -1, 0), (1, 1, 1)}.
A149547
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, 0, -1), (-1, 0, 1), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =55a(5) =183a(6) =819a(7) =2879a(8) =13213a(9) =49231a(10) =226629a(11) =876199a(12) =4067573a(13) =16096651a(14) =75181093a(15) =303273801a(16) =1421299301a(17) =5822068963a(18) =27370535379a(19) =113468717975a(20) =534935197769
External references
- oeis: A149547