131395

Appears in sequences

• a(n) = n^2 + 2*n + 2^n.at n=17A220425
• Expansion of (1-2*x)/((2-x)*sqrt(5*x^2-6*x+1))+1/(2-x).at n=9A262664
• Nonprime numbers k for which k*k' is a palindrome, where k' is the arithmetic derivative of k (A003415).at n=23A359331