Some Hankel determinants with nice evaluations Johann Cigler Abstract: We give some results and conjectures about Hankel determinants with nice evaluations: Hankel determinants of convolution powers of Catalan numbers Cn, different approaches to Hankel determinants of sequences such as (1,-1,-1, 2, 2,-5,-5,14,14,...), whose values are Fibonacci numbers and finally Hankel determinants of sequences (an) such that an?0 iff n+1 is a power of 2.
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