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, 0), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
A151022
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, 0), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =36a(4) =180a(5) =752a(6) =3760a(7) =16736a(8) =83680a(9) =385344a(10) =1926720a(11) =9058512a(12) =45292560a(13) =215891600a(14) =1079458000a(15) =5195196624a(16) =25975983120a(17) =125901336112a(18) =629506680560
External references
- oeis: A151022