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, 0, 1), (0, 1, -1), (1, 0, 0)}.
A149859
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, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =13a(4) =38a(5) =124a(6) =424a(7) =1476a(8) =5196a(9) =18925a(10) =70739a(11) =268198a(12) =1021458a(13) =3934866a(14) =15386445a(15) =60817590a(16) =241493597a(17) =963318241a(18) =3874403554a(19) =15708096480a(20) =63979516337a(21) =261305467446
External references
- oeis: A149859