130956domain: NAppears in sequencesC(n-3,3)+C(n-7,7)+...+C(n-(4*floor((n-4)/4)+3),4*floor((n-4)/4)+3).at n=28A101552a(n) = Sum_{d|n} d^d * binomial(n/d-1,d-1).at n=39A376018