Main diagonal of number array A083075.

A083080

Main diagonal of number array A083075.

Terms

    a(0) =1a(1) =3a(2) =33a(3) =547a(4) =11713a(5) =309411a(6) =9763393a(7) =359046339a(8) =15096500481a(9) =714852041923

External references