Let L(n) = Fibonacci(n-1)+Fibonacci(n+1) (cf. A000045, A000032); if n is even then a(n) = (L(n)+2)^2 otherwise a(n) = L(2*n)+2.

A233000

Let L(n) = Fibonacci(n-1)+Fibonacci(n+1) (cf. A000045, A000032); if n is even then a(n) = (L(n)+2)^2 otherwise a(n) = L(2*n)+2.

Terms

    a(0) =16a(1) =5a(2) =25a(3) =20a(4) =81a(5) =125a(6) =400a(7) =845a(8) =2401a(9) =5780a(10) =15625a(11) =39605a(12) =104976a(13) =271445a(14) =714025a(15) =1860500a(16) =4879681a(17) =12752045a(18) =33408400a(19) =87403805a(20) =228886641a(21) =599074580a(22) =1568556025a(23) =4106118245a(24) =10750371856a(25) =28143753125a(26) =73682388025a(27) =192900153620a(28) =505022001201

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