Records in A001987.

Terms

a(0) =1a(1) =33a(2) =79a(3) =107a(4) =311a(5) =487a(6) =665a(7) =857a(8) =2293a(9) =3523a(10) =13909a(11) =26713a(12) =29351a(13) =59801a(14) =70877a(15) =296475a(16) =3201195a(17) =5188215a(18) =6524653a(19) =8035685a(20) =121139393a(21) =140879803