Numbers k such that the number of divisors of k! divides the number of divisors of (2k)!.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =10a(5) =13a(6) =20a(7) =22a(8) =24a(9) =32a(10) =33a(11) =34a(12) =37a(13) =42a(14) =56a(15) =68a(16) =75a(17) =100a(18) =102a(19) =108a(20) =114a(21) =129a(22) =133a(23) =134a(24) =136a(25) =148a(26) =149a(27) =153a(28) =159a(29) =161