Number of partitions of {1,...,n} into blocks such that no block size is repeated more than 3 times.

A115275

Number of partitions of {1,...,n} into blocks such that no block size is repeated more than 3 times.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =51a(6) =187a(7) =820a(8) =3670a(9) =18191a(10) =97917a(11) =554500a(12) =3334465a(13) =20871592a(14) =138440031a(15) =972083845a(16) =6985171390a(17) =52194795327a(18) =412903730293

External references