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, 0, 1), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
A150261
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, 0, 1), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =87a(5) =360a(6) =1539a(7) =6656a(8) =29519a(9) =131997a(10) =599591a(11) =2742867a(12) =12663920a(13) =58792883a(14) =274700270a(15) =1288694040a(16) =6076057801a(17) =28734777315a(18) =136432700264a(19) =649355428719
External references
- oeis: A150261