A043083 a(n)=(s(n)+6)/10, where s(n)=n-th base 10 palindrome that starts with 4.

1, 5, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 401, 412, 423, 434, 445, 456, 467, 478, 489, 500, 4001, 4011, 4021, 4031, 4041, 4051, 4061, 4071, 4081, 4091, 4102, 4112, 4122, 4132, 4142, 4152, 4162, 4172, 4182, 4192, 4203, 4213

Offset

1,2

Links

Table of n, a(n) for n=1..44.

Mathematica

(#+6)/10&/@Select[Range[50000], PalindromeQ[#]&&IntegerDigits[#][[1]]==4&] (* Harvey P. Dale, Feb 11 2022 *)

Crossrefs

Sequence in context: A003084 A010573 A326265 * A041599 A302692 A232881

Adjacent sequences: A043080 A043081 A043082 * A043084 A043085 A043086

Keyword

nonn,base

Author

Clark Kimberling

Status

approved