Difference between the square root of n-th square triangular number and n-th lambda number given by the recurrence f(n) = 2f(n-1) + f(n-2), f(1) = 1, f(2)= 2.

A113450

Difference between the square root of n-th square triangular number and n-th lambda number given by the recurrence f(n) = 2f(n-1) + f(n-2), f(1) = 1, f(2)= 2.

Terms

    a(0) =0a(1) =4a(2) =30a(3) =192a(4) =1160a(5) =6860a(6) =40222a(7) =235008a(8) =1371120a(9) =7994836a(10) =46605438a(11) =271656000a(12) =1583374520a(13) =9228697244a(14) =53789065150a(15) =313506312192

External references