Number of partitions of {1...n} containing 3 pairs of consecutive integers, where each pair is counted within a block and a string of more than 2 consecutive integers are counted two at a time.

A105480

Number of partitions of {1...n} containing 3 pairs of consecutive integers, where each pair is counted within a block and a string of more than 2 consecutive integers are counted two at a time.

Terms

    a(0) =1a(1) =4a(2) =20a(3) =100a(4) =525a(5) =2912a(6) =17052a(7) =105240a(8) =683100a(9) =4652340a(10) =33168850a(11) =246999480a(12) =1917186635a(13) =15480884720a(14) =129811538960

External references