Start of a record-breaking run of consecutive arithmetic numbers.

Terms

a(0) =1a(1) =5a(2) =19a(3) =41a(4) =181a(5) =347a(6) =1497a(7) =4955a(8) =6026a(9) =17101a(10) =55923a(11) =80897a(12) =131729a(13) =167585a(14) =393033a(15) =673859a(16) =1484603a(17) =2761381a(18) =9220483a(19) =13694929a(20) =47390331a(21) =82626389a(22) =108980139a(23) =717512595a(24) =972975322a(25) =1333553577a(26) =2547417520a(27) =3033935561a(28) =21214519093a(29) =24441006509