Numbers k such that k and k+1 are modest (cf. A054986).

Terms

a(0) =411a(1) =811a(2) =1421a(3) =2036a(4) =2044a(5) =2054a(6) =3054a(7) =4036a(8) =4044a(9) =4054a(10) =8036a(11) =12036a(12) =16036a(13) =20036a(14) =24036a(15) =28036a(16) =32036a(17) =40011a(18) =40044a(19) =50054a(20) =50074a(21) =80011a(22) =88296a(23) =100110a(24) =100270a(25) =100369a(26) =120296a(27) =120404a(28) =140021a(29) =144242