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, 0), (-1, 0, 1), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.
A148461
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, 0), (-1, 0, 1), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =18a(5) =59a(6) =210a(7) =771a(8) =2934a(9) =11472a(10) =45768a(11) =185861a(12) =766004a(13) =3196617a(14) =13484009a(15) =57423388a(16) =246560056a(17) =1066400837a(18) =4642659695a(19) =20329547786a(20) =89487624762a(21) =395791623498
External references
- oeis: A148461