54638

Appears in sequences

• a(n) = Sum_{i=0..floor(n/2)} A047072(i, n-2*i).at n=26A047079
• Integers n not of form 3m+1 such that for any integer k>0, n*10^k-1 has a divisor in the set { 7, 11, 13, 37 }.at n=12A243974