246809

Properties

Appears in sequences

• Common factors of 2^p-1 and the p-th Fibonacci number, p prime.at n=14A080051
• Primes p such that p + 1 or p - 1 is a concatenation of successive even numbers starting from 2.at n=3A210734
• Number of (n+1)X(1+1) 0..2 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..1+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.at n=12A232780
• Prime numbersat n=21780