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), (-1, 1, 0), (1, 0, -1), (1, 1, 1)}.
A149544
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), (-1, 1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =55a(5) =183a(6) =797a(7) =2857a(8) =12825a(9) =48217a(10) =220507a(11) =854979a(12) =3952923a(13) =15705777a(14) =73027971a(15) =295763237a(16) =1381032123a(17) =5676154103a(18) =26604487189a(19) =110624463481a(20) =520256180685
External references
- oeis: A149544