1,2

4*F(2n-1) + 7*F(2n) - 6n - 4, with F(n) = A000045(n) (Fibonacci). - Ralf Stephan, Feb 07 2004

T(2n, n+1), T given by A026998.

Sequence in context: A142188 A156156 A071230 this_sequence A029531 A158485 A005902

Adjacent sequences: A026997 A026998 A026999 this_sequence A027001 A027002 A027003

nonn

Clark Kimberling (ck6(AT)evansville.edu)