Numbers starting with 1 such that the sum of any two distinct elements has an even number of distinct prime factors.

A180514

Numbers starting with 1 such that the sum of any two distinct elements has an even number of distinct prime factors.

Terms

    a(0) =1a(1) =5a(2) =9a(3) =13a(4) =35a(5) =39a(6) =286a(7) =290a(8) =381a(9) =385a(10) =866a(11) =4376a(12) =10461a(13) =13506a(14) =19709a(15) =50925a(16) =139046a(17) =144086a(18) =188517a(19) =623114a(20) =6815124a(21) =7226204a(22) =7647853a(23) =8970817a(24) =42716373a(25) =64176516a(26) =189403472a(27) =240240118a(28) =463852538a(29) =520740373

External references