196095

Appears in sequences

• Number of primitive (period n) periodic palindromes using a maximum of two different symbols.at n=33A056493
• Number of primitive (period n) periodic palindromes using exactly two different symbols.at n=33A056498
• Numbers n such that phi(n)+phi(n+1)=n+1.at n=38A067798
• Composite k such that (k+1) * Sum_{d|k} d/sigma(d) is an integer.at n=28A068975
• Triangle, read by rows, where T(n,k) equals the sum of squares of numbers < 2^n having exactly k ones in their binary expansion.at n=29A110200
• a(n) = sum of squares of numbers < 2^n having exactly 2 ones in their binary representation.at n=7A110202