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, 0, 0), (1, -1, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
A150999
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, 0, 0), (1, -1, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =38a(4) =174a(5) =800a(6) =3798a(7) =18079a(8) =87274a(9) =422415a(10) =2059680a(11) =10064422a(12) =49389115a(13) =242777149a(14) =1196585692a(15) =5905460251a(16) =29196695458a(17) =144498323490a(18) =716025773879
External references
- oeis: A150999