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), (0, 1, -1), (1, 0, 0)}.
A148706
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), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =23a(5) =74a(6) =258a(7) =929a(8) =3418a(9) =12920a(10) =49467a(11) =192556a(12) =757468a(13) =3010957a(14) =12069935a(15) =48741852a(16) =198121154a(17) =809861094a(18) =3327311012a(19) =13731810688a(20) =56901053708a(21) =236645162453a(22) =987443318634
External references
- oeis: A148706