Ulam numbers u such that 5*u is also an Ulam number.

Terms

a(0) =36a(1) =97a(2) =138a(3) =206a(4) =358a(5) =402a(6) =722a(7) =2816a(8) =3205a(9) =3725a(10) =3918a(11) =3962a(12) =5020a(13) =5516a(14) =7461a(15) =8368a(16) =8756a(17) =9193a(18) =9621a(19) =10247a(20) =11219a(21) =11586a(22) =11759a(23) =12365a(24) =12580a(25) =12602a(26) =13164a(27) =13401a(28) =14892a(29) =15820