a(n) is the sum of the squares of the areas under Motzkin paths of length n.

A367778

a(n) is the sum of the squares of the areas under Motzkin paths of length n.

Terms

    a(0) =0a(1) =1a(2) =6a(3) =40a(4) =198a(5) =910a(6) =3848a(7) =15492a(8) =59920a(9) =224917a(10) =824074a(11) =2960828a(12) =10466610a(13) =36498195a(14) =125801144a(15) =429284612a(16) =1452174984a(17) =4874940295a(18) =16254780970a(19) =53873727516a(20) =177594715034a(21) =582603630260

External references