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), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
A150939
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), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =34a(4) =158a(5) =679a(6) =3253a(7) =14760a(8) =71727a(9) =335029a(10) =1641681a(11) =7805363a(12) =38448803a(13) =184950224a(14) =914283364a(15) =4433932897a(16) =21973441964a(17) =107194799250a(18) =532196641059
External references
- oeis: A150939