25229

Properties

Appears in sequences

• a(n) = n^3 + n^2 - 1.at n=28A003777
• Prime number spiral (clockwise, West spoke).at n=26A054570
• Third term of strong prime sextets: p(m-1)-p(m-2) > p(m)-p(m-1) > p(m+1)-p(m) > p(m+2)-p(m+1) > p(m+3)-p(m+2).at n=6A054815
• Numbers k such that the smoothly undulating palindromic number (91*10^k - 19)/99 is a prime.at n=5A062227
• Least j > 1 for n > 0 such that j^2 = (n^2 + 1)*(k^2) + (n^2 + 1)*k + 1 where k sequence = A106230.at n=29A106229
• Numbers n such that f(n), f(n+1) and f(n+2) are prime, f(m)=72*m^2+7.at n=28A121089
• a(n) = 841*n - 1.at n=29A158402
• a(n) = 30*n^2 - 1.at n=28A158560
• Primes p such that 2p+1, 3p+2 and 5p-2 are also primes.at n=24A178068
• Primes that are the sum of 25 consecutive primes.at n=31A215991
• Odd k for which abs(2^m - k) is nonprime for all m < k.at n=13A263865
• Primes p such that p+2^3, p+2^5 and p+2^7 are all primes.at n=36A275475
• Primes p = x^2 + y^2 such that x - y is a cube greater than one.at n=33A282405
• Positions of records in A204911.at n=18A317249
• G.f.: -sqrt(1 - 4*x)*(2*x - 1)/(3*x - 1).at n=10A320827
• a(n) = Sum_{1 <= i, j <= n} gcd(i, j, n)^3.at n=28A368743
• First differences of A379290.at n=73A379296
• Primes having only {2, 5, 9} as digits.at n=11A385786
• Primes having only {0, 2, 5, 9} as digits.at n=27A386050
• Primes having only {2, 4, 5, 9} as digits.at n=24A386154