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 A121085 Number of primitive Pythagorean-like triples a^2+b^2=c^2+k for k=-3 with 0
 3, 30, 293, 2881, 28871, 288685, 2886366, 28868362, 288673693, 2886752763 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS It is conjectured by the first author that a(n)/10^n as n->inf is 1/(2*sqrt(3)) = 0.28867... LINKS Table of n, a(n) for n=1..10. EXAMPLE a(1)=3 because there are 3 solutions (a,b,c) as (2,3,4),(5,6,8),(4,9,10) with 0aa+1]; fax = Ceiling[Apply[Times, fax]/2]; total += fax; , {c, m}]; total] (* Courtesy of Daniel Lichtblau of Wolfram Research *) CROSSREFS Cf. A101931, A121082, A121083, A121084, A121086, A121087, A121088 Sequence in context: A180426 A246246 A136896 * A144282 A299866 A136941 Adjacent sequences: A121082 A121083 A121084 * A121086 A121087 A121088 KEYWORD more,nonn AUTHOR Tito Piezas III, Aug 11 2006 EXTENSIONS First few terms found by Tito Piezas III, James Waldby (j-waldby(AT)pat7.com). Subsequent terms found by Andrzej Kozlowski (akoz(AT)mimuw.edu.pl), Daniel Lichtblau (danl(AT)wolfram.com). a(7) from Max Alekseyev, Jul 03 2011 a(8)-a(10) from Hiroaki Yamanouchi, Oct 17 2015 STATUS approved

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Last modified November 28 14:28 EST 2023. Contains 367419 sequences. (Running on oeis4.)