Number of partitions of n containing a clique of size 2.

Terms

a(0) =1a(1) =0a(2) =2a(3) =2a(4) =3a(5) =5a(6) =9a(7) =10a(8) =16a(9) =23a(10) =31a(11) =43a(12) =60a(13) =75a(14) =106a(15) =140a(16) =179a(17) =237a(18) =310a(19) =389a(20) =508a(21) =647a(22) =815a(23) =1032a(24) =1305a(25) =1617a(26) =2033a(27) =2527a(28) =3117a(29) =3857