Numbers n such that n-19, n-1, n+1 and n+19 are consecutive primes.

Terms

a(0) =20982a(1) =28182a(2) =51768a(3) =57222a(4) =76422a(5) =87720a(6) =90678a(7) =104850a(8) =108108a(9) =110730a(10) =141180a(11) =199602a(12) =227112a(13) =248118a(14) =264600a(15) =268842a(16) =304392a(17) =304458a(18) =320082a(19) =322920a(20) =330018a(21) =382728a(22) =401670a(23) =414432a(24) =429972a(25) =450258a(26) =467082a(27) =489408a(28) =520548a(29) =535608