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, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
A150979
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, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =171a(5) =758a(6) =3703a(7) =17223a(8) =85031a(9) =404527a(10) =2007916a(11) =9683182a(12) =48201412a(13) =234472255a(14) =1169082780a(15) =5720655827a(16) =28551336136a(17) =140301234515a(18) =700660163609
External references
- oeis: A150979