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), (-1, 1, 0), (1, 0, -1), (1, 0, 0)}.
A148513
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), (-1, 1, 0), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =17a(5) =36a(6) =132a(7) =324a(8) =1249a(9) =3384a(10) =13513a(11) =39254a(12) =160933a(13) =492667a(14) =2061281a(15) =6573859a(16) =27953711a(17) =92135701a(18) =396995905a(19) =1344484187a(20) =5857194879a(21) =20293100945a(22) =89231953988a(23) =315216303132
External references
- oeis: A148513