Records in A001992.

Terms

a(0) =5a(1) =53a(2) =173a(3) =293a(4) =2477a(5) =9173a(6) =61613a(7) =74093a(8) =170957a(9) =360293a(10) =679733a(11) =2004917a(12) =69009533a(13) =138473837a(14) =237536213a(15) =384479933a(16) =883597853a(17) =1728061733a(18) =9447241877a(19) =49107823133