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, 1), (0, 0, 1), (1, 0, -1), (1, 1, 0)}.
A150553
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, 1), (0, 0, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =105a(5) =443a(6) =1931a(7) =8619a(8) =39138a(9) =180100a(10) =837279a(11) =3924640a(12) =18519066a(13) =87870877a(14) =418876055a(15) =2004669434a(16) =9626561780a(17) =46363330956a(18) =223866924604
External references
- oeis: A150553