Positive integers m such that m * (m+1) contains at least 8 decimal digits that are in neither m nor m+1.
A381247
Positive integers m such that m * (m+1) contains at least 8 decimal digits that are in neither m nor m+1.
Terms
- a(0) =77776a(1) =88888a(2) =444554a(3) =554544a(4) =655555a(5) =656565a(6) =656665a(7) =888787a(8) =888888a(9) =1111121a(10) =1212121a(11) =1222121a(12) =2212121a(13) =2222232a(14) =2222332a(15) =2223222a(16) =2232222a(17) =2322322a(18) =2332222a(19) =3223232a(20) =3223332a(21) =3232222a(22) =3233322a(23) =3322332a(24) =3323232a(25) =3443443a(26) =4334443a(27) =4343443a(28) =4444443a(29) =4544444
External references
- oeis: A381247