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 A298467 Smallest positive integer that can be expressed as the sum of consecutive positive squares in exactly n ways. 2
 1, 25, 20449, 554503705 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(5) > 10^9. - Rémy Sigrist, Jan 19 2018 LINKS FORMULA a(n) <= A234311(n). EXAMPLE a(2) = 25 because 3^2 + 4^2 = 5^2 = 25, a(3) = 20449 because 7^2 + 8^2 + ... + 39^2 = 38^2 + 39^2 + ... + 48^2 = 143^2 = 20449. a(4) = 554503705 because 480^2 + 481^2 + ... + 1210^2 = 3570^2 + 3571^2 + ... + 3612^2 = 3613^2 + 3614^2 + ... + 3654^2 = 7442^2 + 7443^2 ... + 7451^2 = 554503705. - Rémy Sigrist, Jan 19 2018 CROSSREFS Cf. A038547, A111044, A130052, A234304, A234311. Sequence in context: A195682 A082211 A053766 * A203543 A034711 A325215 Adjacent sequences:  A298464 A298465 A298466 * A298468 A298469 A298470 KEYWORD nonn,more AUTHOR Seiichi Manyama, Jan 19 2018 EXTENSIONS a(4) from Rémy Sigrist, Jan 19 2018 STATUS approved

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Last modified February 22 05:37 EST 2020. Contains 332115 sequences. (Running on oeis4.)