Number of partitions of [n] where each block size occurs at most twice.
A360182
Number of partitions of [n] where each block size occurs at most twice.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =14a(5) =41a(6) =152a(7) =575a(8) =2634a(9) =13207a(10) =59927a(11) =312170a(12) =1946870a(13) =10547135a(14) =65168469a(15) =421552409a(16) =3148178034a(17) =20138277895a(18) =141300123713
External references
- oeis: A360182