53239

Properties

Appears in sequences

• Primes p such that the left prime neighbors p1, p2 of p as well as the right prime neighbors q1, q2 of p form twin prime pairs and the sum p1 + p2 + p + q1 + q2 is also prime.at n=30A138396
• Number of UH^jU's, DH^jD's, and DH^jU's for some j>0, in all peakless Motzkin paths of length n (here U=(1,1), D=(1,-1) and H=(1,0); can be easily expressed using RNA secondary structure terminology).at n=15A187259
• Primes of the form 5*n^3-1.at n=2A200910
• Number of (w,x,y) with all terms in {0,...,n} and |w-x| + |x-y| != w+x+y.at n=37A213480
• Prime powers that are equal to the sum of the first k prime powers (not including 1) for some k.at n=25A364797
• Prime numbersat n=5432