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 A273553 Numbers n such that n! is the sum of a square and a nonnegative cube. 1
 0, 1, 2, 4, 19, 21 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Numbers n such that n! = x^2 + y^3 where x, y are integers and y >= 0, is soluble. a(7) > 33. - Giovanni Resta, Jun 03 2016 LINKS Table of n, a(n) for n=1..6. EXAMPLE 4 is a term because 4! = 4^2 + 2^3. 19 is a term because 19! = 345427200^2 + 132480^3. 21 is a term because 21! = 6389296200^2 + 2173500^3. CROSSREFS Cf. A000142, A022549. Sequence in context: A275000 A290595 A009418 * A153691 A184308 A268338 Adjacent sequences: A273550 A273551 A273552 * A273554 A273555 A273556 KEYWORD nonn,more AUTHOR Altug Alkan, May 25 2016 STATUS approved

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Last modified September 15 22:11 EDT 2024. Contains 375959 sequences. (Running on oeis4.)