Numbers k such that sigma(k) == 0 (mod k+4).

Terms

a(0) =9a(1) =56a(2) =368a(3) =780a(4) =836a(5) =2352a(6) =11096a(7) =17816a(8) =45356a(9) =77744a(10) =91388a(11) =128768a(12) =254012a(13) =388076a(14) =430272a(15) =2087936a(16) =2291936a(17) =13174976a(18) =29465852a(19) =35021696a(20) =45335936a(21) =120888092a(22) =184773312a(23) =260378492a(24) =381236216a(25) =775397948a(26) =3381872252a(27) =4856970752a(28) =6800228816a(29) =8589344768