Numbers k which when sandwiched between two 8's give a multiple of k.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =11a(5) =13a(6) =14a(7) =22a(8) =26a(9) =28a(10) =44a(11) =52a(12) =56a(13) =77a(14) =88a(15) =91a(16) =137a(17) =146a(18) =274a(19) =292a(20) =548a(21) =584a(22) =9091a(23) =19802a(24) =39604a(25) =79208a(26) =909091a(27) =5882353a(28) =10989011a(29) =12987013