47051

Properties

Appears in sequences

• phi(s(n^3)) is a square, where s(n) is sigma(n)-n (A001065).at n=26A063798
• Indices of triangular numbers in A087359.at n=11A087360
• Numbers n such that 4*10^n + 7*R_n + 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=7A102996
• Number of (ordered) sequences of coins (each of which has value 1, 2, 5, 10, 20, 50, 100 or 200) which add to n.at n=21A114138
• Number of ordered sequences of coins (each of which has value 1, 2, 5, 10 or 20) which add to n.at n=21A114140
• Primes of form p*q - 2 where p and q are consecutive primes.at n=2A123921
• Primes of the form 5n^2 + 6.at n=13A201484
• Number of self-inverse permutations p on [n] where the maximal displacement of an element equals 4.at n=14A238915
• Primes of the form 2*n^2+26*n+11.at n=38A243888
• Odd primes p for which there are exactly as many primes in the range [prevprime(p)^2, prevprime(p)*p] as there are in the range [prevprime(p)*p, p^2], where prevprime(p) gives the previous prime before prime p.at n=40A256473
• Primes 4k + 3 at the end of the maximal gaps in A268799.at n=13A268801
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 97", based on the 5-celled von Neumann neighborhood.at n=42A270154
• Number of 5-element subsets of [n] whose sum is a triangular number.at n=35A320851
• Triples (a,b,c) such that (a+b+c)^3 = concat(a,b,c), a, b, c > 0, ordered by size of this value.at n=39A328199
• Prime numbersat n=4854