65998

Appears in sequences

• Triangle T(n,k) of numbers/2 of non-extendable (complete) non-self-adjacent simple paths within a square lattice bounded by rectangles with nodal dimensions n and k, n >= k >= 2.at n=18A213106
• a(n) = Sum_{i=0..n} digsum(i)^4, where digsum(i) = A007953(i).at n=28A231689