1420496domain: NAppears in sequencesNumber of base 28 circular n-digit numbers with adjacent digits differing by 3 or less.at n=7A125338Numbers n such that n and n+1 both have 40 divisors.at n=16A274811a(n) = Sum_{k=0..n} 2^((n + k - 1)*(n - k)/2) * n! / (n - k)!. Row sums of A365638.at n=6A379614