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), (0, 1, 0), (1, -1, 0), (1, 1, -1)}.
A148190
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), (0, 1, 0), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =30a(6) =99a(7) =293a(8) =1044a(9) =3407a(10) =12855a(11) =44919a(12) =176474a(13) =649372a(14) =2629712a(15) =10070299a(16) =41769656a(17) =165069542a(18) =698089371a(19) =2829957804a(20) =12160768699a(21) =50345664661a(22) =219252800095a(23) =923848427883
External references
- oeis: A148190