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 A370828 a(n) are the denominators corresponding to A370827(n). 2
 2, 32, 392, 4352, 46112, 3584, 4860032, 49160192, 494961152, 451796992, 49818601472, 288555008, 4993469652992, 49960817917952, 499764907507712, 294034673238016, 49991536670277632, 3759016691892224, 4999695320129994752, 4545288356434542592, 11627651895922786304 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS See A370827 and A370823 for more information. LINKS Table of n, a(n) for n=1..21. FORMULA A370827(n)/a(n) = (2/3) * (3/5)^n * ((5/2)^n - 1) / (1 - (3/5)^n). EXAMPLE A370827(n)/a(n) for n = 1..8: 3/2, 63/32, 1053/392, 16443/4352, 250533/46112, 28431/3584, 56859813/4860032, 853737003/49160192. PROG (PARI) a370828(n) = denominator((2/3) * (3/5)^n * ((5/2)^n - 1) / (1 - (3/5)^n)) (Python) from math import gcd def A370828(n): return (a:=5**n-3**n<

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Last modified June 21 11:00 EDT 2024. Contains 373544 sequences. (Running on oeis4.)