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, 1), (0, 1, -1), (0, 1, 1), (1, -1, 0), (1, 0, 1)}.
A150853
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, 1), (0, 1, -1), (0, 1, 1), (1, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =140a(5) =628a(6) =2896a(7) =13567a(8) =64365a(9) =308151a(10) =1485833a(11) =7204422a(12) =35088850a(13) =171518779a(14) =840911474a(15) =4132992702a(16) =20355478219a(17) =100429656440a(18) =496242132791
External references
- oeis: A150853