354609

Appears in sequences

• a(n + 4) = (n + 2)*(a(n + 3) - a(n) + 1) for n > 3, a(0) = a(1) = a(2) = a(3) = 1.at n=11A121987
• Numbers k of the form 4m+1 for which A087808(sigma(k)) is equal to 2*A087808(k).at n=8A332445