Number of partitions of {1,...,n} into block sizes not a multiple of 3.

A113774

Number of partitions of {1,...,n} into block sizes not a multiple of 3.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =32a(6) =112a(7) =415a(8) =1732a(9) =7678a(10) =37115a(11) =190016a(12) =1039546a(13) =5996083a(14) =36528196a(15) =233492044a(16) =1564012751a(17) =10940385668a(18) =79762304116a(19) =604791685063

External references