Rectangular array read by antidiagonals: a(n, d) is the smallest number that starts an arithmetic progression with common difference d of n numbers with the same number of divisors.
A113465
Rectangular array read by antidiagonals: a(n, d) is the smallest number that starts an arithmetic progression with common difference d of n numbers with the same number of divisors.
Terms
- a(0) =1a(1) =2a(2) =1a(3) =33a(4) =3a(5) =1a(6) =242a(7) =3a(8) =2a(9) =1a(10) =11605a(11) =213a(12) =119a(13) =3a(14) =1a(15) =28374a(16) =213a(17) =3445a(18) =3a(19) =2a(20) =1a(21) =171893a(22) =1383a(23) =15026a(24) =111a(25) =77a(26) =5a(27) =1a(29) =3091a(30) =74783
External references
- oeis: A113465