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, -1), (1, 0, 1), (1, 1, 0), (1, 1, 1)}.
A151217
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, -1), (1, 0, 1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =55a(4) =261a(5) =1191a(6) =5823a(7) =27455a(8) =135735a(9) =651283a(10) =3235979a(11) =15691615a(12) =78165883a(13) =381665709a(14) =1903940151a(15) =9341340523a(16) =46638349691a(17) =229624827839
External references
- oeis: A151217