117703

Properties

Appears in sequences

• Primes p such that denominator of Sum_{k=1..p-1} 1/k^2 is a square and denominator Sum_{k=1..p-1} 1/k^3 is a cube and denominator Sum_{k=1..p-1} 1/k^4 is a fourth power.at n=30A127062
• Numerator of Sum_{k=1..n} 1/lambda(k), where lambda(k) is the Carmichael's lambda function.at n=33A211306
• Prime(k), where k is such that (1 + Sum_{j=1..k} prime(j)^9) / k is an integer.at n=13A233042
• Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the upper median plus the lower median of every 2X2 subblock equal.at n=5A236878
• Number of (n+1)X(6+1) 0..2 arrays with the maximum plus the upper median plus the lower median of every 2X2 subblock equal.at n=1A236882
• T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with the maximum plus the upper median plus the lower median of every 2 X 2 subblock equal.at n=22A236884
• T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with the maximum plus the upper median plus the lower median of every 2 X 2 subblock equal.at n=26A236884
• Number of partitions of n with up to four distinct kinds of 1.at n=43A320691
• E.g.f.: exp(x/(1 - x)) / (1 - 2*x).at n=6A331689
• Beginning with 11, least prime such that concatenation of first n terms and its digit reversal both are primes.at n=35A380227
• Prime numbersat n=11104