37684

Appears in sequences

• G.f. = continued fraction: A(x)=1/(1-x-x/(1-x^2-x^2/(1-x^3-x^3/(1-x^4-x^4/(...))))).at n=12A088354
• Numbers n such that n^2+1, (n+2)^2+1, (n+6)^2+1, (n+10)^2+1 and (n+12)^2+1 are prime.at n=3A218047
• Numbers k such that 5*R_k + 10^k - 4 is prime, where R_k = 11...11 is the repunit (A002275) of length k.at n=8A259122
• Number of integers in n-th generation of tree T(-1/2) defined in Comments.at n=27A274147