login
A372794
Number of pairs of two disjoint sets of n positive integers with product A354457(n).
0
1, 1, 3, 4, 31, 15, 55, 110, 280, 797, 1419, 3557, 5647, 19559, 59708, 360726, 346487, 2018032, 2106172, 13228494, 13994982, 65426469, 110980446, 257148638, 660593345, 1966842579, 3909078573, 20820932559, 26864715089, 144689720443, 307476230099, 571509614773
OFFSET
2,3
EXAMPLE
For n=2, there exists only one pair of sets <{1,6},{2,3}> with product 1*6=2*3, so a(2)=1.
CROSSREFS
Cf. A354457.
Sequence in context: A151466 A347978 A127068 * A058603 A042653 A219679
KEYWORD
nonn
AUTHOR
Zhao Hui Du, May 13 2024
STATUS
approved