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A238304 Number of monic quartic polynomials with coefficients from {1..n} and maximum coefficient equal to n, for which all four roots are integers. 1
0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 2, 0, 0, 2, 1, 0, 1, 1, 2, 1, 0, 0, 2, 1, 1, 2, 1, 0, 2, 0, 2, 2, 0, 1, 1, 1, 1, 1, 3, 0, 2, 0, 1, 2, 1, 1, 4, 1, 1, 1, 1, 0, 2, 2, 2, 2, 0, 1, 3, 1, 0, 1, 3, 1, 2, 0, 2, 2, 2, 1, 4, 1, 0, 3, 1, 0, 1, 0, 5, 2, 3, 1, 2, 2, 0, 2, 1, 1, 3, 1, 2, 2, 1, 2, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,24

COMMENTS

Among first 10000 terms the largest is a(8640) = 174.

Also a(n) = 0 for n = 1,2,3,4,5,7,8,10,11,14,16,19,23,25,26,29,34,35,41,43,46,53,55,65,70,74,79,86,.. (329 terms among first 10000 terms.)

LINKS

Zak Seidov, Table of n, a(n) for n = 1..10000

CROSSREFS

Cf. A238097.

Sequence in context: A143620 A291529 A236417 * A219487 A303907 A290870

Adjacent sequences:  A238301 A238302 A238303 * A238305 A238306 A238307

KEYWORD

nonn

AUTHOR

Zak Seidov, Feb 24 2014

STATUS

approved

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Last modified August 4 09:03 EDT 2020. Contains 336201 sequences. (Running on oeis4.)