22751

Properties

Appears in sequences

• Primes that are each the sum of two, three, and four consecutive composite numbers.at n=28A060339
• Primes with 21 as smallest positive primitive root.at n=4A061333
• Primes for which the smallest positive primitive root is odd and nonprime.at n=11A070269
• Number of planar partitions of n with trace 4.at n=18A089351
• a(0) = 1, a(n) = 1 + 2*3 + 4*5 + 6*7 + ... + (2n)*(2n+1) for n > 0.at n=25A098931
• a(n) is the smallest natural number we cannot obtain from n, n+1, n+2, n+3, n+4, n+5, n+6, n+7 and the operators +, -, *, /, using each number only once.at n=3A143192
• Primes of the form 250n + 1.at n=25A179231
• Primes of the form 7n^2 + 8.at n=2A201608
• Sophie Germain primes p such that p + 2 and p - 2 are semiprimes.at n=42A277993
• Primes p such that (p^1024 + 1)/2 is prime.at n=3A341272
• Number of skew shapes in a 3 X n rectangle with no empty rows or columns.at n=20A362153
• Prime numbersat n=2543