Numbers k such that k, k+1, k+2, and k+3 are not divisible by any of their nonzero digits.

Terms

a(0) =56a(1) =506a(2) =556a(3) =586a(4) =596a(5) =656a(6) =667a(7) =757a(8) =787a(9) =857a(10) =866a(11) =867a(12) =956a(13) =976a(14) =977a(15) =5056a(16) =5066a(17) =5096a(18) =5506a(19) =5666a(20) =5756a(21) =5776a(22) =5876a(23) =5906a(24) =5986a(25) =5996a(26) =6056a(27) =6067a(28) =6506a(29) =6697