90793

Properties

Appears in sequences

• Primes for which only three iterations of 'Prime plus its digit sum equals a prime' are possible.at n=20A048525
• Expansion of ( 1-x ) / ( 1-x-3*x^2+x^3 ).at n=16A052973
• a(n) is the square of the n-th partial sum minus the n-th partial sum of the squares, divided by a(n-1), for all n>=1, starting with a(0)=1, a(1)=3.at n=15A087956
• The smallest of four consecutive primes with prime gaps {a,b,c} = {10,18,2}.at n=13A215719
• Expansion of g.f. (1-6*x+7*x^2)/(1-7*x+11*x^2-x^3).at n=9A216949
• Number of nX6 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,0) or (-1,1) and new values introduced in order 0..2.at n=6A275181
• Number of 7 X n 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,0) or (-1,1) and new values introduced in order 0..2.at n=5A275187
• Numbers k such that 5*10^k + 21 is prime.at n=25A281839
• a(n) is the first prime p such that, if q is the next prime, (p*q+p+q)/5^n is a prime.at n=3A358482
• Prime numbersat n=8784