Partial sums of A008443.

Terms

a(0) =1a(1) =4a(2) =7a(3) =11a(4) =17a(5) =20a(6) =26a(7) =35a(8) =38a(9) =45a(10) =54a(11) =60a(12) =69a(13) =78a(14) =84a(15) =90a(16) =105a(17) =114a(18) =121a(19) =133a(20) =136a(21) =151a(22) =166a(23) =172a(24) =184a(25) =196a(26) =205a(27) =217a(28) =232a(29) =238