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), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
A148701
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), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =23a(5) =69a(6) =245a(7) =843a(8) =3131a(9) =11686a(10) =45158a(11) =176864a(12) =706881a(13) =2860401a(14) =11741295a(15) =48690351a(16) =204110532a(17) =862945671a(18) =3679362070a(19) =15800715238a(20) =68318850083a(21) =297198674659
External references
- oeis: A148701