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, 1, 0), (0, 0, -1), (1, 0, 1)}.
A149239
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, 1, 0), (0, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =36a(5) =125a(6) =451a(7) =1611a(8) =6098a(9) =23153a(10) =88821a(11) =346225a(12) =1365886a(13) =5401489a(14) =21606970a(15) =86968247a(16) =351607286a(17) =1428888059a(18) =5840997903a(19) =23943014939a(20) =98559682258a(21) =407172518273
External references
- oeis: A149239