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, 0), (-1, 1, 1), (0, 0, -1), (0, 0, 1), (1, 0, 1)}.
A150338
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, 0), (-1, 1, 1), (0, 0, -1), (0, 0, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =86a(5) =324a(6) =1299a(7) =5248a(8) =21775a(9) =91053a(10) =386100a(11) =1650934a(12) =7124220a(13) =30968386a(14) =135455089a(15) =595865245a(16) =2633401172a(17) =11691086039a(18) =52101621996a(19) =233046312802
External references
- oeis: A150338