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, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
A150977
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, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =169a(5) =749a(6) =3620a(7) =16829a(8) =82399a(9) =391822a(10) =1932376a(11) =9315468a(12) =46137134a(13) =224369868a(14) =1114224182a(15) =5451178811a(16) =27118628625a(17) =133243991331a(18) =663673232831
External references
- oeis: A150977