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, 1, -1), (0, 1, -1), (0, 1, 1), (1, -1, -1)}.
A148539
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, 1, -1), (0, 1, -1), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =19a(5) =45a(6) =161a(7) =457a(8) =1617a(9) =5179a(10) =18131a(11) =61299a(12) =219129a(13) =765515a(14) =2776355a(15) =9926825a(16) =36499945a(17) =133137127a(18) =493900777a(19) =1827816497a(20) =6849662167a(21) =25616738187a(22) =96849082153a(23) =365387747275
External references
- oeis: A148539