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Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A166478 Minimum positive integer solution t of equation n=x*(x+1)/(t*(t+1)) where n is a nonsquare integer (see A000037). 2 2, 1, 2, 1, 2, 5, 1, 3, 2, 3, 5, 1, 12, 6, 4, 3, 1, 2, 9, 19, 2, 10, 1, 5, 4, 5, 237, 9, 14, 2, 30, 15, 10, 2, 6, 5, 6, 84, 1, 3, 20, 41, 3, 2, 5, 14, 209, 1, 6, 2, 11, 230, 13, 23, 27, 3, 56, 1, 24, 14, 5, 2, 8, 7, 8, 1634, 11, 6, 2, 1, 35, 71, 4, 36, 24, 5, 18, 12, 3, 9, 8, 1, 2, 6, 14, 17 (list; graph; refs; listen; history; text; internal format) OFFSET 2,1 LINKS Table of n, a(n) for n=2..87. EXAMPLE For n=14, t=5 gives corresponding value x=20 since 14=20*21/(5*6). CROSSREFS Cf. A000037, A166477. Sequence in context: A197945 A374336 A099986 * A050325 A332510 A001314 Adjacent sequences: A166475 A166476 A166477 * A166479 A166480 A166481 KEYWORD nonn AUTHOR Carmine Suriano, Oct 14 2009 EXTENSIONS Deleted a 1 between 2 and 30. - R. J. Mathar, Oct 23 2010 STATUS approved

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Last modified August 18 23:05 EDT 2024. Contains 375284 sequences. (Running on oeis4.)