Triangle read by rows: n-th row is the first arithmetic progression with common difference n of n numbers with the same prime signature.

A087307

Triangle read by rows: n-th row is the first arithmetic progression with common difference n of n numbers with the same prime signature.

Terms

    a(0) =1a(1) =3a(2) =5a(3) =155a(4) =158a(5) =161a(6) =111a(7) =115a(8) =119a(9) =123a(10) =3875983a(11) =3875988a(12) =3875993a(13) =3875998a(14) =3876003a(15) =1333a(16) =1339a(17) =1345a(18) =1351a(19) =1357a(20) =1363

External references