A034780 The n-th entry is K(n,4) and A034693(K(n,4)) = 4 for all n. The subscript n refers to this sequence and K(n,4) is the index in sequence A034693. Example: K(2,4)=13 and A034693(13)=4.

7, 13, 25, 27, 37, 43, 45, 49, 57, 67, 73, 79, 84, 87, 93, 97, 115, 127, 139, 142, 160, 163, 169, 175, 177, 193, 199, 205, 207, 213, 234, 235, 253, 255, 258, 265, 267, 277, 279, 295, 298