Perimeter of integer triangle (A001611(n), A001611(n+1), A001611(n+2)).

Terms

a(0) =5a(1) =7a(2) =9a(3) =13a(4) =19a(5) =29a(6) =45a(7) =71a(8) =113a(9) =181a(10) =291a(11) =469a(12) =757a(13) =1223a(14) =1977a(15) =3197a(16) =5171a(17) =8365a(18) =13533a(19) =21895a(20) =35425a(21) =57317a(22) =92739a(23) =150053a(24) =242789a(25) =392839a(26) =635625a(27) =1028461a(28) =1664083a(29) =2692541