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, -1, 1), (1, 0, 0), (1, 1, -1)}.
A148254
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, -1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =38a(6) =142a(7) =495a(8) =1999a(9) =7639a(10) =32410a(11) =131732a(12) =578108a(13) =2451480a(14) =11019463a(15) =48167875a(16) =220369210a(17) =985213006a(18) =4568163974a(19) =20777640886a(20) =97351386710a(21) =448791075548
External references
- oeis: A148254