51857

Appears in sequences

• Number of compositions of n into twin primes (i.e., primes that are members of a twin prime pair, like 3, 5, 7, 11, 13, but not 2 or 23).at n=48A077608
• Numbers k such that the last 9 digits of the k-th Lucas number are 1-9 pandigital.at n=13A216488