(n-1)-st elementary symmetric function of the first n terms of A010684.

Terms

a(0) =1a(1) =4a(2) =7a(3) =24a(4) =33a(5) =108a(6) =135a(7) =432a(8) =513a(9) =1620a(10) =1863a(11) =5832a(12) =6561a(13) =20412a(14) =22599a(15) =69984a(16) =76545a(17) =236196a(18) =255879a(19) =787320a(20) =846369a(21) =2598156a(22) =2775303a(23) =8503056a(24) =9034497a(25) =27634932a(26) =29229255a(27) =89282088a(28) =94065057a(29) =286978140