118681

Properties

Appears in sequences

• Numbers k such that (10^k - 3^k)/7 is prime.at n=7A128026
• Number of bipartite partitions of (n,n) into distinct pairs.at n=13A219554
• E.g.f.: exp(x + 4*x^2 + 9*x^3 + 16*x^4).at n=6A293723
• Square array A(n,k), n >= 0, k >= 1, read by antidiagonals, where column k is the expansion of e.g.f. exp(Sum_{j=1..k} j^2*x^j).at n=51A293724
• Numbers n such that both n-1 and n are nonsquares and the least positive solutions to the Pell equations x1^2 - n*y1^2 =1 and x0^2-(n-1)*y0^2 = 1 have a record for rho(n)=log(x1)/log(x0).at n=27A303604
• Prime numbersat n=11188