51421

Properties

Appears in sequences

• Primes p such that the differences between the 5 consecutive primes starting with p are (6,4,6,2).at n=9A078963
• Numbers n such that 2*10^n + 7*R_n + 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=14A102959
• Primes p such that (12*p - 1, 12*p + 1) and (18*p - 1, 18*p + 1) are twin primes.at n=8A138660
• Number of 0..n arrays x(0..3) of 4 elements with nondecreasing average value.at n=23A200764
• Primes of the form 2*n^2+30*n+13.at n=17A243889
• Logarithmic transform of the cubes A000578.at n=7A300452
• Square array A(n,k), n >= 1, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f. log(1 + Sum_{j>=1} j^k * x^j/j!).at n=51A308484
• Number of Deutsch paths with peaks at odd height.at n=17A350114
• Prime numbersat n=5260