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), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150648
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), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =117a(5) =511a(6) =2289a(7) =10454a(8) =48363a(9) =226027a(10) =1065173a(11) =5050638a(12) =24077657a(13) =115270660a(14) =553893214a(15) =2669689176a(16) =12901958990a(17) =62495145519a(18) =303328095502
External references
- oeis: A150648