87221
domain: N
Properties
Primality
- Prime
- yes
Appears in sequences
- Expansion of 1/((1-7*x)*(1-9*x)*(1-10*x)).at n=4A020970
- Primes p such that p+2, n*(p+2)+6 and p*(p+2)+8 are also prime.at n=18A130735
- Lesser of twin primes p1 such that p1*p2+-6 are prime numbers.at n=27A174955
- Number of (n+1)X(n+1) -7..7 symmetric matrices with every 2X2 subblock having sum zero and one, two or three distinct values.at n=8A211445
- Prime numbersat n=8469