74597

Properties

Appears in sequences

• Class 7+ primes.at n=13A081635
• Number of ways to build a contiguous building with n LEGO blocks of size 2 X 4 on top of a fixed block of the same size so that the building is symmetric after a rotation by 180 degrees.at n=5A123831
• Numbers k such that 2^(k-1) == 1 + b*k (mod k^2), where b divides k-1.at n=20A186645
• Numbers k such that 2^(k-1) == 1 + b*k (mod k^2), where b divides k - 2^p for some integer p >= 0 and 2^p <= b.at n=46A186884
• Primes p such that the period of the continued fraction of (1-sqrt(p))/2 has length 3 and p is not of the form k^2+1.at n=27A188136
• Expansion of (1 + x + x^2)/(1 - x - 3*x^2 - x^3 + x^4).at n=13A280758
• Prime numbersat n=7358