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), (0, -1, -1), (1, 1, 1)}.
A149510
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), (0, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =47a(5) =155a(6) =589a(7) =2243a(8) =8561a(9) =33467a(10) =133517a(11) =529315a(12) =2148221a(13) =8691577a(14) =35431673a(15) =145777825a(16) =600472755a(17) =2488691561a(18) =10353202637a(19) =43132961113a(20) =180596954251a(21) =757853615215
External references
- oeis: A149510