Number of non-palindromic n-tuples of 5 distinct elements.

A240437

Number of non-palindromic n-tuples of 5 distinct elements.

Terms

    a(0) =0a(1) =20a(2) =100a(3) =600a(4) =3000a(5) =15500a(6) =77500a(7) =390000a(8) =1950000a(9) =9762500a(10) =48812500a(11) =244125000a(12) =1220625000a(13) =6103437500a(14) =30517187500a(15) =152587500000a(16) =762937500000

External references