450971566080

domain: N

Appears in sequences

Let P(k,X) = 4^k*Product_{i=1..k} (X - cos(Pi*i/k)) (which is a polynomial with integer coefficients). Sequence gives maximum absolute values of coefficients of P(n,X).at n=17A075614
Number of n X 2 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.at n=16A268965
a(n) is the least number of the form p^2 + q^2 - 2 for primes p and q that is an odd multiple of 2^n, or -1 if there is no such number.at n=32A359439