Number of pairs of two disjoint sets of n positive integers more than 1 with product A354697.

Terms

a(0) =1a(1) =4a(2) =2a(3) =25a(4) =7a(5) =31a(6) =55a(7) =114a(8) =237a(9) =695a(10) =1666a(11) =2646a(12) =6928a(13) =42986a(14) =79098a(15) =126721a(16) =375348a(17) =667321a(18) =1831927a(19) =7130833a(20) =12067929a(21) =42973699a(22) =105786888a(23) =218943019a(24) =646950177a(25) =1476274502a(26) =3846678717a(27) =14320262729a(28) =46445678648a(29) =91771247330