Dificult sequence? Please help to finde out a,b,c?

[FBIagent]

a,347,515,559,6 36,771,b,c
Hellow. I need to find out what are the numbers a,b,c. Can anyone help me to find it pls.?

[shabinesh]

the sequence really is insane :) , as 347 is prime I dont think there exists a valid progression and there is no nice interval. Did you try converting these to different different bases?

[FBIagent]

oh never mind i figure out this sequence :) And lol i forgot to say that this sequence is made of sequence of 2 digits :)

[Mathismylove]

ive tried figuring it out but ive got nada.

[FBIagent]

i figure out that all numbers which where consisted of 2 digits the made into numbers of 3 digits: 39 43 47 51 55 59 63 67 71 75 79 83
394 347 515 559 636 771 757 983

[Mathismylove]

thats pretty abstract..very interesting though..never saw that coming...thanks . if you see anymore challenging sequences please do share.