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), (0, -1, 1), (0, 0, -1), (1, 1, 0)}.
A149267
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), (0, -1, 1), (0, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =40a(5) =146a(6) =556a(7) =2193a(8) =8782a(9) =35996a(10) =149102a(11) =626514a(12) =2657002a(13) =11364796a(14) =49005900a(15) =212539829a(16) =927754782a(17) =4068514036a(18) =17928721394a(19) =79325129056a(20) =352268070718
External references
- oeis: A149267