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, 0), (1, 1, 0), (1, 1, 1)}.
A150905
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, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =31a(4) =141a(5) =579a(6) =2615a(7) =11614a(8) =52822a(9) =242632a(10) =1119881a(11) =5220036a(12) =24434712a(13) =114912593a(14) =543292303a(15) =2574373387a(16) =12251435551a(17) =58432107543a(18) =279438870548
External references
- oeis: A150905