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A273553 Numbers n such that n! is the sum of a square and a nonnegative cube. 0
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 November 13 17:34 EST 2019. Contains 329106 sequences. (Running on oeis4.)