43705

Appears in sequences

• Number of ordered 5-tuples of integers from [ 2,n ] with no common factors among triples.at n=25A015657
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 19.at n=14A031607
• a(n) = 26*n^2 - 1.at n=40A158551
• Sequence with a (1,-1) Somos-4 Hankel transform.at n=14A178080
• Numbers n such that A003146(n) = floor(alpha^3*n)+1, where alpha = 1.839... is the positive real zero of x^3-x^2-x-1.at n=42A278353