a(n) is the smallest number which has in its English name the letter "e" in the n-th position beginning the count from the end, or -1 if no such number exists.
A173203
a(n) is the smallest number which has in its English name the letter "e" in the n-th position beginning the count from the end, or -1 if no such number exists.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =7a(4) =8a(5) =11a(6) =21a(7) =17a(8) =23a(9) =74a(10) =73a(11) =104a(12) =103a(13) =111a(14) =115a(15) =113a(16) =117a(17) =124a(18) =123a(19) =173a(20) =373a(21) =723a(22) =773a(23) =873a(24) =1111a(25) =1115a(26) =1113a(27) =1117a(28) =1124a(29) =1123
External references
- oeis: A173203