Number of set partitions of [n] having exactly five pairs (m,m+1) such that m+1 is in some block b and m is in block b+1.
A270959
Number of set partitions of [n] having exactly five pairs (m,m+1) such that m+1 is in some block b and m is in block b+1.
Terms
- a(0) =4a(1) =127a(2) =1856a(3) =20074a(4) =191967a(5) =1753407a(6) =15845905a(7) =144101608a(8) =1329935983a(9) =12512797900a(10) =120312183453
External references
- oeis: A270959