740910077497domain: NAppears in sequencesA Chebyshev transform of the Catalan numbers.at n=25A101499Imaginary part of a Gaussian integer sequence with a Gaussian integer Somos-4 Hankel transform.at n=25A183894Imaginary part of a Gaussian integer sequence with a Gaussian integer Somos-4 Hankel transform.at n=26A183894