Numbers k such that 3*k+1 divides 3^k+1.

Terms

a(0) =0a(1) =1a(2) =9a(3) =3825a(4) =6561a(5) =102465a(6) =188505a(7) =190905a(8) =1001385a(9) =1556985a(10) =3427137a(11) =5153577a(12) =5270625a(13) =5347881a(14) =13658225a(15) =14178969a(16) =20867625a(17) =23828049a(18) =27511185a(19) =29400657a(20) =48533625a(21) =80817009a(22) =83406609a(23) =89556105a(24) =108464265a(25) =123395265a(26) =127558881a(27) =130747689a(28) =133861905