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, -1), (0, 1, 0), (1, -1, 1)}.
A148260
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, -1), (0, 1, 0), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =14a(5) =33a(6) =111a(7) =303a(8) =1110a(9) =3208a(10) =12008a(11) =36659a(12) =140407a(13) =443934a(14) =1728381a(15) =5621637a(16) =22157625a(17) =73695819a(18) =293433309a(19) =993846730a(20) =3989790974a(21) =13719801711a(22) =55458702423a(23) =193168626049a(24) =785413014326
External references
- oeis: A148260