a(n) = 2^(2n+1)*cos(nA), where A is the angle opposite side BC in a triangle ABC having sidelengths |BC|=2, |CA| = 3, |AB| = 4; ABC is the smallest integer-sided scalene triangle.
A375880
a(n) = 2^(2n+1)*cos(nA), where A is the angle opposite side BC in a triangle ABC having sidelengths |BC|=2, |CA| = 3, |AB| = 4; ABC is the smallest integer-sided scalene triangle.
Terms
- a(0) =2a(1) =7a(2) =17a(3) =7a(4) =-223a(5) =-1673a(6) =-8143a(7) =-30233a(8) =-81343a(9) =-85673a(10) =701777a(11) =6283207a(12) =32754017a(13) =128746807a(14) =377163377a(15) =580194727a(16) =-1973250943a(17) =-23095872233a(18) =-130099090543a(19) =-541159678073
External references
- oeis: A375880