21578

Appears in sequences

• Smallest of 5 consecutive integers divisible respectively by 5 consecutive primes.at n=11A072730
• Number of binary strings of length n with equal numbers of 00000 and 11111 substrings.at n=15A164191
• Monotonic ordering of set S generated by these rules: if x and y are in S then 3xy-x-y is in S, and 2 is in S.at n=21A192529
• a(n) = sum of the first n primes whose distance to next prime is 4.at n=43A360226