a(n) is the number of smallest parts in the overpartitions of n.

Terms

a(0) =2a(1) =6a(2) =12a(3) =26a(4) =44a(5) =84a(6) =136a(7) =230a(8) =366a(9) =580a(10) =884a(11) =1356a(12) =2012a(13) =2968a(14) =4320a(15) =6226a(16) =8856a(17) =12522a(18) =17508a(19) =24324a(20) =33528a(21) =45892a(22) =62392a(23) =84372a(24) =113374a(25) =151548a(26) =201552a(27) =266752a(28) =351380a(29) =460920