39927

Appears in sequences

• Numbers n such that n and prime(n) end with the same three digits.at n=38A067841
• Expansion of g.f. (3 -x +2*x^2)/(1 -3*x +2*x^2 -x^3).at n=11A136305
• Integers n such that 2n^2+1, 2n^3+1 and 2n^4+1 are prime.at n=34A239920
• a(n) = a(n-2) + a(n-3) for n >= 3, with a(0) = a(1) = 2, a(2) = 1.at n=37A276477
• One of the two successive approximations up to 17^n for 17-adic integer sqrt(2). This is the 11 (mod 17) case (except for n = 0).at n=4A322560
• Triangle T(n, k) is the number of times 2^k*3^(-n) arises in the n-th partition appearing in an iterated sequence of partitions of 1 (one for each integer n) into numbers of the form 2^k*3^(-n), for n>=0, read by rows.at n=66A348863
• Number of 1-unbordered words of length n over a 3-letter alphabet beginning with a fixed letter.at n=11A375016