Indices of records in A194591 when it is restricted to odd indices.

Terms

a(0) =1a(1) =5a(2) =13a(3) =47a(4) =59a(5) =109a(6) =241a(7) =335a(8) =1109a(9) =1373a(10) =1447a(11) =14893a(12) =52267a(13) =56543a(14) =649603a(15) =838441a(16) =8840101a(17) =16935761a(18) =100604513a(19) =118373279a(20) =270704167a(21) =1355477231