Numbers k that are the products of two distinct primes such that 2*k-1, 4*k-3, 8*k-7 and 16*k-15 are also products of two distinct primes.

A177213

Numbers k that are the products of two distinct primes such that 2*k-1, 4*k-3, 8*k-7 and 16*k-15 are also products of two distinct primes.

Terms

    a(0) =247a(1) =295a(2) =478a(3) =634a(4) =694a(5) =721a(6) =1255a(7) =1267a(8) =1294a(9) =1387a(10) =1546a(11) =1762a(12) =1942a(13) =2323a(14) =2374a(15) =2773a(16) =3005a(17) =3334a(18) =3403a(19) =3883a(20) =3949a(21) =4126a(22) =4714a(23) =4741a(24) =4777a(25) =5062a(26) =5269a(27) =5287a(28) =5353a(29) =5422

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