74491

Appears in sequences

• Numbers k such that the decimal representation of k is contained as substring in that of the k-th triangular number.at n=16A119238
• a(n) = smallest semiprime s such that s + n is the next semiprime and there is no prime between s and s + n.at n=14A133478
• Least number that is the start of a prime-semiprime gap of size n.at n=14A278351
• Numbers that are nontrivially palindromic in three or more consecutive integer bases.at n=24A279093