25242

Appears in sequences

• Theta series of A_6 lattice.at n=25A008446
• a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-1)*a(1) for n >= 5, with initial values 1,1,1,1.at n=12A025268
• Numbers n for which there are exactly ten k such that n = k + reverse(k).at n=28A072434
• Decimal Goedelization of antitheorems from propositional calculus, in Richard C. Schroeppel's metatheory of A101273.at n=19A100200
• Number of cubic equations ax^3 + bx^2 + cx + d = 0 with integer coefficients |a|,|b|,|c|,|d| <= n, a <> 0, having three distinct real roots.at n=9A155191
• a(n) = n*(14*n + 13).at n=42A195028
• Numbers k such that 3^k + 10 is prime.at n=24A217137
• Expansion of F(x) where F(x) = 1 + x / (1 - x / F(-x^2) ).at n=30A238430
• Numbers k such that A002313(m) is the greatest prime divisor of k^2 + 1 and A002313(m+1) is the greatest prime divisor of (k+1)^2 + 1 for some m.at n=9A253596
• a(n) = Sum_{1 <= i, j, k <= n} gcd(i,j,k).at n=26A344522
• a(n) is the first number that is the sum of two palindromic primes in exactly n ways.at n=4A379138