63635

Appears in sequences

• Numbers k such that k*(k+2) gives the concatenation of a number m with itself.at n=10A116286
• Number of eight-prime Carmichael numbers less than 10^n.at n=17A174616
• a(n) = smallest k having at least four prime divisors d such that (d + n) | (k + n).at n=12A202159
• Absolute values of the numerators of the third column of ( 0 followed by (interleave 0 , A001803(n))/A060818(n) ) and its successive differences.at n=9A224270