Least positive integer whose decimal digits divide the plane into n+1 regions. Equivalently, least positive integer with n holes in its decimal digits.
A249572
Least positive integer whose decimal digits divide the plane into n+1 regions. Equivalently, least positive integer with n holes in its decimal digits.
Terms
- a(0) =1a(1) =4a(2) =8a(3) =48a(4) =88a(5) =488a(6) =888a(7) =4888a(8) =8888a(9) =48888a(10) =88888a(11) =488888a(12) =888888a(13) =4888888a(14) =8888888a(15) =48888888a(16) =88888888a(17) =488888888a(18) =888888888a(19) =4888888888a(20) =8888888888a(21) =48888888888a(22) =88888888888a(23) =488888888888a(24) =888888888888
External references
- oeis: A249572