2687362domain: NAppears in sequencesConvolution of A000108 (Catalan) with A000351 (powers of 5).at n=9A046714Numerators of partial sums of Catalan numbers scaled by powers of 1/5.at n=9A121002Riordan transform of the Fibonacci sequence with the Riordan matrix A053121.at n=20A281861