31751

Properties

Appears in sequences

• Numbers n such that (13^n - 1)/12 is prime.at n=10A016054
• Replace n with concatenation of its odd divisors >1.at n=50A037284
• Replace 2n+1 with concatenation of its divisors >1.at n=25A037287
• Numerators of continued fraction convergents to sqrt(635).at n=3A042218
• Numbers k such that k^14 == 1 (mod 15^3).at n=37A056087
• Primes in which the digit string can be partitioned into three parts such that third (least significant) part is the product of the first two.at n=22A088294
• Primes of the form 8*k^2 - 1.at n=27A090684
• Triangle T(n,k) = 2*binomial(n,k)^2 - 1, read by rows, 0<=k<=n.at n=49A141597
• Triangle T(n,k) = 2*binomial(n,k)^2 - 1, read by rows, 0<=k<=n.at n=50A141597
• a(n) = 1250*n^2 + 100*n + 1.at n=4A154375
• a(n) = 18*n^2 - 1.at n=41A157910
• a(n) = 72*n^2 - 1.at n=20A158738
• Primes p such that the product of the distinct prime factors of p^2-1 is less than p.at n=24A275631
• First occurrence of n in A362465 or -1 if n is not a term in A362465.at n=7A362466
• Prime numbersat n=3415