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, 0, 0), (0, -1, 1), (0, 1, 1), (1, 1, -1), (1, 1, 0)}.
A150856
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, 0, 0), (0, -1, 1), (0, 1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =141a(5) =636a(6) =2940a(7) =13823a(8) =65721a(9) =315216a(10) =1522515a(11) =7391165a(12) =36038108a(13) =176319221a(14) =865083102a(15) =4254538369a(16) =20965316148a(17) =103485337461a(18) =511540876219
External references
- oeis: A150856