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, 1), (1, -1, -1), (1, 1, 0)}.
A148614
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, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =21a(5) =55a(6) =190a(7) =566a(8) =2017a(9) =6310a(10) =22819a(11) =74608a(12) =271579a(13) =910758a(14) =3341986a(15) =11432723a(16) =42096370a(17) =146207641a(18) =540521446a(19) =1898301662a(20) =7036732860a(21) =24948540427a(22) =92685827088a(23) =331032848634
External references
- oeis: A148614