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, 0), (0, 0, -1), (1, -1, 1), (1, 0, 0)}.
A148232
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, 0), (0, 0, -1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =34a(6) =111a(7) =352a(8) =1221a(9) =4184a(10) =15083a(11) =55391a(12) =205712a(13) =779703a(14) =2997654a(15) =11661511a(16) =45778491a(17) =181783227a(18) =728691627a(19) =2937711675a(20) =11944846339a(21) =48899728232a(22) =201293267995a(23) =833025368003
External references
- oeis: A148232