a(n) = sqrt(1 + P(n)*P(n+1)*P(n+2)*P(n+3)) where P(n) = A000129(n) are the Pell numbers.
A383225
a(n) = sqrt(1 + P(n)*P(n+1)*P(n+2)*P(n+3)) where P(n) = A000129(n) are the Pell numbers.
Terms
- a(0) =1a(1) =11a(2) =59a(3) =349a(4) =2029a(5) =11831a(6) =68951a(7) =401881a(8) =2342329a(9) =13652099a(10) =79570259a(11) =463769461a(12) =2703046501a(13) =15754509551a(14) =91824010799a(15) =535189555249
External references
- oeis: A383225