Antisigma(n): Sum of the numbers less than n that do not divide n.

Terms

a(0) =0a(1) =0a(2) =2a(3) =3a(4) =9a(5) =9a(6) =20a(7) =21a(8) =32a(9) =37a(10) =54a(11) =50a(12) =77a(13) =81a(14) =96a(15) =105a(16) =135a(17) =132a(18) =170a(19) =168a(20) =199a(21) =217a(22) =252a(23) =240a(24) =294a(25) =309a(26) =338a(27) =350a(28) =405a(29) =393