A083441 Largest n-digit palindrome with a digit sum of n.

1, 11, 111, 2002, 20102, 300003, 3001003, 40000004, 400010004, 5000000005, 50000100005, 600000000006, 6000001000006, 70000000000007, 700000010000007, 8000000000000008, 80000000100000008, 900000000000000009, 9000000001000000009, 91000000000000000019, 910000000010000000019

Offset

1,2

Links

Andrew Howroyd, Table of n, a(n) for n = 1..1000

Prog

(PARI) a(n)=my(h=n\2, w=h\9+1, q=10^w-10+h%9); if(n%2, 10^h) + q*10^(n-w) + fromdigits(Vecrev(digits(q))) \\ Andrew Howroyd, Dec 10 2024

Crossrefs

Cf. A083440.

Sequence in context: A199764 A097177 A136982 * A261269 A031974 A117293

Adjacent sequences: A083438 A083439 A083440 * A083442 A083443 A083444

Keyword

base,easy,nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 01 2003

Extensions

a(19) onwards from Andrew Howroyd, Dec 10 2024

Status

approved