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, 0, 0), (0, 1, 0), (1, 0, -1), (1, 1, 1)}.
A150619
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, 0, 0), (0, 1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =113a(5) =488a(6) =2153a(7) =9694a(8) =44271a(9) =204554a(10) =953315a(11) =4475849a(12) =21137241a(13) =100325552a(14) =478223145a(15) =2287958851a(16) =10981230887a(17) =52852954902a(18) =255010311345
External references
- oeis: A150619