A372794 Number of pairs of two disjoint sets of n positive integers with product A354457(n).

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

Author

Zhao Hui Du, May 13 2024

Keywords

• nonn

Examples

			For n=2, there exists only one pair of sets <{1,6},{2,3}> with product 1*6=2*3, so a(2)=1.
		

Links

• Zhao Hui Du, C++ Source Code.

Crossrefs

Cf. A354457.