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), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
A150912
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), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =31a(4) =147a(5) =600a(6) =2912a(7) =12774a(8) =62607a(9) =285326a(10) =1406716a(11) =6562785a(12) =32476435a(13) =153891360a(14) =763425348a(15) =3657237743a(16) =18174467649a(17) =87764324143a(18) =436691863394
External references
- oeis: A150912