Even composites m such that A086902(m)==7 (mod m).

Terms

a(0) =4a(1) =8a(2) =22a(3) =88a(4) =472a(5) =5588a(6) =10408a(7) =20648a(8) =34568a(9) =123076a(10) =1783976a(11) =3677228a(12) =4609418a(13) =4857688a(14) =6027208a(15) =9906578a(16) =16508152a(17) =19995308a(18) =20226572a(19) =32039062a(20) =56484004a(21) =88835528a(22) =97896692a(23) =135858088a(24) =354671468a(25) =1091638108a(26) =2260976428a(27) =3495804596a(28) =3723523516a(29) =5577624308