The number of positive n-digit integers whose digit product is n.

Terms

a(0) =1a(1) =2a(2) =3a(3) =10a(4) =5a(5) =36a(6) =7a(7) =120a(8) =45a(9) =90a(10) =0a(11) =924a(12) =0a(13) =182a(14) =210a(15) =3860a(16) =0a(17) =3060a(18) =0a(19) =3800a(20) =420a(21) =0a(22) =0a(23) =61824a(24) =300a(25) =0a(26) =3627a(27) =10584a(28) =0a(29) =25230