First gap of length at least n in A007950, lower end.

Terms

a(0) =1a(1) =5a(2) =5a(3) =37a(4) =37a(5) =187a(6) =187a(7) =821a(8) =821a(9) =821a(10) =821a(11) =13301a(12) =13301a(13) =109941a(14) =109941a(15) =522717a(16) =522717a(17) =522717a(18) =522717a(19) =1247282901a(20) =1247282901