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, -1), (-1, 0, 0), (0, 0, 1), (0, 1, 0), (1, -1, 0)}.
A149877
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, -1), (-1, 0, 0), (0, 0, 1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =14a(4) =42a(5) =140a(6) =480a(7) =1694a(8) =6160a(9) =22768a(10) =86119a(11) =329819a(12) =1276827a(13) =5009624a(14) =19807663a(15) =79034687a(16) =317771172a(17) =1284909978a(18) =5231953571a(19) =21409625876a(20) =88032238475a(21) =363768052841
External references
- oeis: A149877