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), (0, 0, -1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
A150713
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), (0, 0, -1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =27a(4) =124a(5) =503a(6) =2339a(7) =10145a(8) =48142a(9) =216689a(10) =1038060a(11) =4785186a(12) =23084148a(13) =108070026a(14) =523987765a(15) =2480766805a(16) =12073222580a(17) =57632297111a(18) =281311616872
External references
- oeis: A150713