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A319591 Number of nonnegative integer matrices with n columns and any number of nonzero distinct rows with every column summing to 3 up to permutation of rows. 2
1, 2, 17, 364, 14595, 937776, 88507276, 11584785137, 2017129470049, 452573312572094, 127585778625167901, 44275881599081757633, 18594652294164085489646, 9315786786179883210141889, 5499383628157822564248546214, 3784760890972848935690646794792 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Also, the number of factorizations of m^3 into distinct factors where m is a product of n distinct primes.

LINKS

Andrew Howroyd, Table of n, a(n) for n = 0..100

CROSSREFS

Row n=3 of A219585.

Cf. A322487.

Sequence in context: A307315 A243509 A128159 * A198405 A202972 A085617

Adjacent sequences:  A319588 A319589 A319590 * A319594 A319595 A319596

KEYWORD

nonn

AUTHOR

Andrew Howroyd, Dec 16 2018

STATUS

approved

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Last modified April 22 11:46 EDT 2019. Contains 322330 sequences. (Running on oeis4.)