83420

Appears in sequences

• Number of basic invariants for cyclic group of order and degree n.at n=26A002956
• Number of permutations p of {1,2,3,...,n} such that Sum_{k=1..n} abs(k-p(k)) = 2n.at n=10A072949
• Numbers k such that k and k+1 both have the prime signature (2,1,1,1) (A189982).at n=28A336658