92241

Appears in sequences

• Numbers n such that n-1, n and n+1 can be expressed as a sum of 2 squares in at least 2 ways.at n=13A091459
• a(n) = A188491(n-1) + A188495(n-1) + A188497(n-1).at n=12A188493
• E.g.f. A(x) satisfies A(x) = 1/( 1 - x * cosh(x * A(x)^(1/2)) / A(x) ).at n=9A380954