Number of n-step walks on a cube lattice starting from the origin but not returning to it at any stage.

A063888

Number of n-step walks on a cube lattice starting from the origin but not returning to it at any stage.

Terms

    a(0) =1a(1) =6a(2) =30a(3) =180a(4) =1026a(5) =6156a(6) =35940a(7) =215640a(8) =1271106a(9) =7626636a(10) =45182124a(11) =271092744a(12) =1610875836a(13) =9665255016a(14) =57546367704a(15) =345278206224

External references