28542

Appears in sequences

• Reverse of largest prime factor of n = smallest prime factor of n+1; a(1)=1.at n=21A071393
• Positions of sevens (ground states) in A084451.at n=25A084449
• Number of n X 2 binary arrays whose sum with another n X 2 binary array containing no more than a single 1 has rows and columns in lexicographically nondecreasing order.at n=19A225894
• Number of ordered ways to achieve a score of n in American football taking into account different scoring methods.at n=30A237997
• Let e_n(k)>=0 denote the exponent of prime(k) in the prime power representation of n. The sequence lists 1 followed by numbers n for which e_n(2*i-1)=e_n(2*i), for all i>=1.at n=43A275407
• Numbers k such that starting with prime(k) 3, 5, 7, 9, and 11 consecutive primes sum up to prime numbers.at n=7A288142
• Numbers m such that abs(K(m+1) - K(m)) = 2, and both m and m+1 are squarefree (A005117), where K(m) = A002034(m) is the Kempner function.at n=15A346212