Numbers k such that tau(k) = tau(k+1) mod 691, where tau is Ramanujan's tau function A000594.

Terms

a(0) =184a(1) =2103a(2) =3421a(3) =3638a(4) =4342a(5) =5181a(6) =6029a(7) =6233a(8) =8323a(9) =8628a(10) =8721a(11) =9658a(12) =9905a(13) =11322a(14) =11774a(15) =11888a(16) =12410a(17) =12774a(18) =12811a(19) =13063a(20) =13484a(21) =14744a(22) =14906a(23) =15065a(24) =15247a(25) =16581a(26) =16610a(27) =18248a(28) =18396a(29) =18703