Lesser of twin primes isolated from neighboring primes by +- 10 (or more).

Terms

a(0) =521a(1) =1931a(2) =1949a(3) =2111a(4) =2309a(5) =2591a(6) =3389a(7) =4421a(8) =4547a(9) =6449a(10) =6761a(11) =7349a(12) =7949a(13) =9239a(14) =9719a(15) =9767a(16) =10007a(17) =10037a(18) =10499a(19) =10529a(20) =10709a(21) =11351a(22) =11549a(23) =11717a(24) =12071a(25) =13397a(26) =14387a(27) =14591a(28) =15581a(29) =15971