34861

Appears in sequences

• Strong pseudoprimes to base 12.at n=23A020238
• Strong pseudoprimes to base 20.at n=13A020246
• Strong pseudoprimes to base 63.at n=23A020289
• Strong pseudoprimes to base 66.at n=13A020292
• Numbers n such that 8*10^n + 6*R_n - 3 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=23A103087
• Diagonal immediately below the main diagonal of triangle A130521.at n=9A130522
• Number of partitions p of n such that (number of numbers in p of form 3k+2) = (number of numbers in p of form 3k).at n=47A241741
• a(n) = floor(5*prime(n)^2 / 4).at n=38A246010
• Number of unrooted 3-connected triangulations of a disk with n nodes.at n=7A342056
• Centered 10-gonal numbers which are products of two primes.at n=35A367792
• Numerators of the partial alternating sums of the reciprocals of the sum of unitary divisors function (A034448).at n=27A379515
• Composite numbers in A381019 which are immediately followed by another composite number, in order of their appearance.at n=26A379810
• E.g.f. A(x) satisfies A(x) = 1 + sinh(x*A(x)^3).at n=5A381430