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), (1, -1, 0), (1, -1, 1), (1, 1, 1)}.
A149538
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), (1, -1, 0), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =51a(5) =179a(6) =707a(7) =2631a(8) =10657a(9) =41565a(10) =169377a(11) =678979a(12) =2805783a(13) =11404107a(14) =47516901a(15) =195827851a(16) =820726217a(17) =3412550073a(18) =14390982059a(19) =60257900655a(20) =255171625883
External references
- oeis: A149538