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), (0, 0, -1), (0, 1, 1), (1, 0, 1), (1, 1, 1)}.
A151224
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), (0, 0, -1), (0, 1, 1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =57a(4) =269a(5) =1263a(6) =6087a(7) =29353a(8) =143181a(9) =699193a(10) =3434479a(11) =16889777a(12) =83336909a(13) =411613143a(14) =2037184517a(15) =10091009051a(16) =50051745221a(17) =248426942387
External references
- oeis: A151224