a(0) = 0, a(1) = 1, for n > 1, a(n) = a(n-1) + a(n-A002487(n)).

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =6a(5) =8a(6) =14a(7) =20a(8) =40a(9) =48a(10) =68a(11) =82a(12) =150a(13) =190a(14) =272a(15) =354a(16) =708a(17) =858a(18) =1130a(19) =1280a(20) =2138a(21) =2328a(22) =3186a(23) =3894a(24) =7080a(25) =8210a(26) =10538a(27) =11818a(28) =20028a(29) =23214