Total number of self-intersections of all n-step walks on the square lattice starting at the origin.
A098981
Total number of self-intersections of all n-step walks on the square lattice starting at the origin.
Terms
- a(0) =0a(1) =0a(2) =4a(3) =32a(4) =212a(5) =1184a(6) =6256a(7) =31104a(8) =150612a(9) =707232a(10) =3270128a(11) =14845312a(12) =66716016a(13) =296203136a(14) =1305752896a(15) =5706772992a(16) =24810133076a(17) =107172696736a(18) =461076481904
External references
- oeis: A098981