18243

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 15.at n=8A031693
• Sum of a(n) terms of 1/k^(6/7) first exceeds n.at n=22A056183
• Number of digits in the decimal expansion of the number of partitions of 2^n.at n=28A129490
• a(n) = 225n^2 + 2n.at n=8A158228
• a(n) = Sum_{k<=n} A007955(k), where A007955(m) = product of divisors of m.at n=21A175318
• a(n) = (prime(n) - 1)*(prime(n+1) - 1)/2 + 3.at n=42A201498
• (1/4) * number of ways to select 3 distinct points forming a triangle of unsigned area = n/2 from a square of grid points with side length n.at n=15A320310
• Euler transform of A055457.at n=33A373296
• a(0) = 1; a(n) = (11*n^2 - 9*n + 4)/2 for n>0.at n=58A389625