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, 1), (-1, 0, 1), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
A150847
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, 1), (-1, 0, 1), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =140a(5) =617a(6) =2825a(7) =12989a(8) =60799a(9) =285605a(10) =1355212a(11) =6448778a(12) =30876524a(13) =148182226a(14) =714046275a(15) =3447484841a(16) =16691884243a(17) =80949584877a(18) =393388278159
External references
- oeis: A150847