77994

Appears in sequences

• Let s denote the sum of the abundant numbers in the aliquot parts of x. Sequence lists numbers x such that sigma(s) = usigma(x), where usigma(x) is the sum of the unitary divisors of x (A034448).at n=21A258135
• Numbers k such that F(k)*F(k+1) + F(k+2) is a prime, where F = A000045 (Fibonacci numbers).at n=43A305414
• a(n) is the number of domino towers of height n consisting of 2*n bricks, a(n) = A333650(2*n, n).at n=6A339346