102031

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 8x + 3.at n=23A023292
• Primes p such that the smallest integer whose sum of decimal digits is p is prime.at n=30A129990
• a(n) = smallest k such that the digits of exactly n nonnegative numbers are a subsequence of the digits of k.at n=38A275782
• Always start on the lowest digit of a(n), then visit all digits of a(n) in increasing order. The terms of the sequence are the smallest one that force the visitor to walk n steps to complete his tour (a single step drives you from a digit to the closest one).at n=12A336611
• Prime numbersat n=9771