1,1

a(n) = 2*A006094(n);

together with A069482(n) and A069484(n) a Pythagorean triangle is formed with area = A069487(n).

Sequence in context: A084699 A064483 A110019 this_sequence A117313 A080563 A005147

Adjacent sequences: A069483 A069484 A069485 this_sequence A069487 A069488 A069489

nonn

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Mar 29 2002