Odd squarefree numbers with an even number of prime factors that have no prime factors greater than 31.

A002557

Odd squarefree numbers with an even number of prime factors that have no prime factors greater than 31.

Terms

    a(0) =1a(1) =15a(2) =21a(3) =33a(4) =35a(5) =39a(6) =51a(7) =55a(8) =57a(9) =65a(10) =69a(11) =77a(12) =85a(13) =87a(14) =91a(15) =93a(16) =95a(17) =115a(18) =119a(19) =133a(20) =143a(21) =145a(22) =155a(23) =161a(24) =187a(25) =203a(26) =209a(27) =217a(28) =221a(29) =247

External references