a(1)=1, a(2)=1 and for n > 2, a(n) is the smallest positive integer such that the third-order absolute difference gives the Fibonacci numbers A000045 = {1,1,2,3,5,8,...}.

A086651

a(1)=1, a(2)=1 and for n > 2, a(n) is the smallest positive integer such that the third-order absolute difference gives the Fibonacci numbers A000045 = {1,1,2,3,5,8,...}.