Total number of n-digit positive integers with multiplicative digital root value 5.

Terms

a(0) =1a(1) =6a(2) =33a(3) =132a(4) =435a(5) =1466a(6) =5341a(7) =18656a(8) =58029a(9) =159430a(10) =392601a(11) =882036a(12) =1836159a(13) =3586506a(14) =6638885a(15) =11738656a(16) =19952441a(17) =32768742a(18) =52220113a(19) =81029700a(20) =122785131a(21) =182142906a(22) =265066605a(23) =379102400a(24) =533695525a(25) =740551526a(26) =1014046281a(27) =1371688948a(28) =1834642167a(29) =2428304010