51756

Appears in sequences

• Number of prime pairs below 10^n having a difference of 38.at n=7A093973
• Row sums in A100781.at n=37A100784
• a(n) = (7*n + 3)*(7*n + 4).at n=32A177071
• G.f.: A(x) = exp( Sum_{n>=1} 4^n * x^n/(n*(1+x^n)) ).at n=8A259274
• Index of the smallest Fibonacci number divisible by prime(n)^2.at n=48A264008
• Maximum number of 6 sphinx tile shapes in a sphinx tiled hexagon of order n.at n=37A291582
• Number of permutations of [n] avoiding {4231, 4123, 1234}.at n=12A294770
• Numbers k such that 327*2^k+1 is prime.at n=26A322956
• Number of regions formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares).at n=20A331766
• Ulam numbers that are oblong (or promic) numbers.at n=16A379828