159222

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 38.at n=20A031716
• Numbers k such that k divides prime(k) + prime(k+1).at n=19A066895
• Numbers k such that prime(k+1)^2 == prime(k)^2 (mod k).at n=46A067783
• Expansion of (1+x^4*C^4)*C^3, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.at n=10A071756
• a(n) = 441*n^2 + 21.at n=19A158603