a(n) = least positive integer m such that m*(m+1) has n-2 distinct digits in base n, all distinct from those (base-n digits) of m and m+1.
A381248
a(n) = least positive integer m such that m*(m+1) has n-2 distinct digits in base n, all distinct from those (base-n digits) of m and m+1.
Terms
- a(0) =1a(1) =4a(2) =14a(3) =156a(4) =20a(5) =750a(6) =1763a(7) =22142a(8) =77776a(9) =64420a(10) =2443077a(11) =52663933a(12) =227623468a(13) =1097568095a(14) =3149642939a(15) =81965144711a(16) =105625962315a(17) =143416754568
External references
- oeis: A381248