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), (0, -1, 1), (0, 1, 1), (1, -1, -1)}.
A148538
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), (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) =17971a(11) =61139a(12) =216903a(13) =762969a(14) =2744373a(15) =9872517a(16) =36150073a(17) =132105411a(18) =487976897a(19) =1811007517a(20) =6765919223a(21) =25368225627a(22) =95571648291a(23) =361732270303
External references
- oeis: A148538