23627

Properties

Appears in sequences

• a(2n) = a(2n-1) + 3a(2n-2), a(2n+1) = 2a(2n) + 3a(2n-1).at n=11A002537
• Primes A005382(n) + A005384(n) - 1 with a twin prime A005382(n) + A005384(n) + 1.at n=29A099109
• Number of partitions of n into parts but with two kinds of parts of sizes 1 to 9.at n=20A103928
• Primes congruent to 20 mod 61.at n=37A142818
• Primes of the form (p^2+2)/33 (with p prime).at n=12A165673
• Primes of the form 7n^3+2.at n=4A201183
• Number of arrays of the median of three adjacent elements of some length-(n+2) 0..4 array.at n=6A228736
• T(n,k) = number of arrays of the median of three adjacent elements of some length n+2 0..k array.at n=51A228740
• Number of arrays of the median of three adjacent elements of some length 9 0..n array.at n=3A228744
• Primes equal to a centered triangular number plus 1.at n=25A285809
• Primes that are values of A215240.at n=9A320041
• Odd numbers k such that the four consecutive odd numbers starting with k have a total of 5 prime factors counting multiplicity.at n=36A328489
• Expansion of e.g.f. exp(x) / (1 - sinh(x)).at n=7A330046
• Numbers m that generate rotationally symmetrical XOR-triangles T(m) that have central triangles of zeros.at n=24A334769
• Primes p such that p-1 is a partial sum of A014574.at n=16A343711
• Twin primes p such that p-1 is a partial sum of A014574.at n=5A343712
• Discriminants of imaginary quadratic fields with class number 37 (negated).at n=22A351675
• Prime numbersat n=2629