A self-descriptive sequence: positions of vowels in "one, three, seven,...".

Terms

a(0) =1a(1) =3a(2) =7a(3) =8a(4) =10a(5) =12a(6) =14a(7) =15a(8) =20a(9) =24a(10) =27a(11) =29a(12) =30a(13) =33a(14) =34a(15) =37a(16) =40a(17) =41a(18) =45a(19) =51a(20) =56a(21) =57a(22) =61a(23) =66a(24) =68a(25) =72a(26) =77a(27) =79a(28) =82a(29) =88