Starts of runs of 5 consecutive Niven (or harshad) numbers (A005349).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =131052a(7) =491424a(8) =1275140a(9) =1310412a(10) =1474224a(11) =1614623a(12) =1912700a(13) =2031132a(14) =2142014a(15) =2457024a(16) =2550260a(17) =3229223a(18) =3931224a(19) =4422624a(20) =4914024a(21) =5405424a(22) =5654912a(23) =5920222a(24) =7013180a(25) =7125325a(26) =7371024a(27) =8073023a(28) =8347710a(29) =9424832