380529

Appears in sequences

• Numbers n such that n^4 +/- n +/- 1 are prime for all four possibilities.at n=4A236766
• The hafnian of a symmetric Toeplitz matrix of order 2*n, n>=2 with the first row (0,2,1,...,1,2); a(0)=1, a(1)=2.at n=7A336400