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), (1, 0, 0), (1, 1, 0), (1, 1, 1)}.
A151175
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), (1, 0, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =49a(4) =219a(5) =971a(6) =4517a(7) =20771a(8) =98450a(9) =461981a(10) =2213354a(11) =10519245a(12) =50753596a(13) =243307767a(14) =1179762984a(15) =5690972110a(16) =27696647862a(17) =134229569535a(18) =655129908566
External references
- oeis: A151175