Partial sums of A001010.

Terms

a(0) =1a(1) =3a(2) =5a(3) =9a(4) =15a(5) =23a(6) =41a(7) =61a(8) =117a(9) =165a(10) =343a(11) =475a(12) =1049a(13) =1397a(14) =3267a(15) =4275a(16) =10419a(17) =13231a(18) =33545a(19) =41965a(20) =109499a(21) =133895a(22) =359367a(23) =434123a(24) =1189795a(25) =1412351a(26) =3952757a(27) =4646449a(28) =13211071a(29) =15318819