Partial sums of the Dedekind psi_2(k) function, for 1 <= k <= n.

Terms

a(0) =0a(1) =1a(2) =6a(3) =16a(4) =36a(5) =62a(6) =112a(7) =162a(8) =242a(9) =332a(10) =462a(11) =584a(12) =784a(13) =954a(14) =1204a(15) =1464a(16) =1784a(17) =2074a(18) =2524a(19) =2886a(20) =3406a(21) =3906a(22) =4516a(23) =5046a(24) =5846a(25) =6496a(26) =7346a(27) =8156a(28) =9156a(29) =9998