5143822

Appears in sequences

• Even semiprimes of the form prime(n)*prime(n+1) - 1.at n=22A103533
• Semiprimes which are the product of a twin prime pair minus one.at n=17A269663
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + n - 1, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=28A294548