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, 1, 0), (1, 0, -1), (1, 0, 0), (1, 1, -1)}.
A148043
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, 1, 0), (1, 0, -1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =19a(6) =59a(7) =160a(8) =540a(9) =1623a(10) =5782a(11) =18621a(12) =69373a(13) =235874a(14) =905452a(15) =3204843a(16) =12614718a(17) =46142381a(18) =185206756a(19) =695627226a(20) =2838006420a(21) =10897855854a(22) =45068748877a(23) =176317050793a(24) =737653565662
External references
- oeis: A148043