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, 1, -1), (-1, 1, 1), (0, 0, -1), (1, 0, 0)}.
A148242
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, 1, -1), (-1, 1, 1), (0, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =36a(6) =115a(7) =342a(8) =1139a(9) =3764a(10) =12958a(11) =44395a(12) =155181a(13) =549379a(14) =1971824a(15) =7110201a(16) =25895872a(17) =94857236a(18) =350624428a(19) =1302239497a(20) =4858414337a(21) =18230049290a(22) =68700089837a(23) =260092887599a(24) =988164427994
External references
- oeis: A148242