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 A059903 Periodic part of continued fraction for sqrt(n), encoded by raising successive primes to the terms. If sqrt(n)=c0+[c1,c2,c3...] then a(n)=2^c1*3^c2*5^c3*... 1
 1, 4, 18, 1, 16, 324, 72030, 162, 1, 64, 5832, 2916, 372027810, 10588410, 1458, 1, 256, 104976, 1036385881030500, 26244, 9421689827550, 4946387159463750, 1556496270, 13122, 1, 1024, 1889568, 2542277241000, 76256028326940, 236196 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Could be made less gigantic by omitting final terms in continued fraction, which are always 2*c0. LINKS FORMULA a(n)=A059900(A059904(n)) EXAMPLE sqrt(14)=3+[1,2,1,6] so a(14)=2^1*3^2*5^1*7^6=10588410. CROSSREFS Sequence in context: A154131 A132554 A077275 * A227540 A246133 A205014 Adjacent sequences:  A059900 A059901 A059902 * A059904 A059905 A059906 KEYWORD easy,nonn AUTHOR Marc LeBrun, Feb 07 2001 STATUS approved

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Last modified August 9 18:32 EDT 2020. Contains 336326 sequences. (Running on oeis4.)