Starts of runs of 7 consecutive Niven (or Harshad) numbers (A005349).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =10000095a(5) =41441420a(6) =124324220a(7) =124324221a(8) =124324222a(9) =207207020a(10) =233735070a(11) =331531220a(12) =350602590a(13) =409036350a(14) =414414020a(15) =467470110a(16) =621621020a(17) =621621021a(18) =621621022a(19) =1030302012a(20) =1036035020a(21) =1051807710a(22) =1201800620a(23) =1243242020a(24) =1243242021a(25) =1243242022