Number of blocks in all partitions of n-set with distinct block sizes.

A131623

Number of blocks in all partitions of n-set with distinct block sizes.

Terms

    a(0) =1a(1) =1a(2) =7a(3) =9a(4) =31a(5) =223a(6) =442a(7) =1529a(8) =6559a(9) =66111a(10) =159952a(11) =742503a(12) =3047656a(13) =19094286a(14) =245173117a(15) =761328969a(16) =3935539271a(17) =20213664703a(18) =117323673136a(19) =897132508439

External references