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, 1), (-1, 1, 1), (1, 0, 1), (1, 1, 0)}.
A150709
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, 1), (-1, 1, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =124a(5) =455a(6) =2211a(7) =8694a(8) =42666a(9) =173949a(10) =860466a(11) =3592959a(12) =17837055a(13) =75804834a(14) =377072874a(15) =1623704936a(16) =8089022510a(17) =35189357432a(18) =175485182791a(19) =769769257377
External references
- oeis: A150709