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), (0, 0, -1), (1, -1, 0), (1, 0, 1)}.
A148598
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), (0, 0, -1), (1, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =20a(5) =58a(6) =186a(7) =619a(8) =2081a(9) =7307a(10) =26033a(11) =93553a(12) =344037a(13) =1272545a(14) =4769054a(15) =18082657a(16) =68887364a(17) =264963390a(18) =1025448933a(19) =3990507558a(20) =15639870083a(21) =61552993252a(22) =243400369077a(23) =966972041698
External references
- oeis: A148598