A098775 Palindromic abundant numbers.

66, 88, 222, 252, 272, 282, 414, 444, 464, 474, 606, 616, 636, 666, 696, 828, 858, 868, 888, 2002, 2112, 2442, 2552, 2772, 2992, 4004, 4224, 4554, 4664, 4884, 5775, 6006, 6336, 6666, 6776, 6996, 8008, 8118, 8228, 8448, 8778, 8888, 20202, 20502, 20802

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Example

a(2) = 88 because 88 is the second abundant number which is palindromic also.

Mathematica

Select[Range[20802], PalindromeQ[#] && DivisorSigma[1, #] > 2 * # &] (* Amiram Eldar, Aug 23 2020 *)

Crossrefs

Intersection of A002113 and A005101.

Sequence in context: A257029 A223734 A031411 * A109759 A194196 A281937

Adjacent sequences: A098772 A098773 A098774 * A098776 A098777 A098778

Keyword

easy,nonn,base

Author

Shyam Sunder Gupta, Oct 03 2004

Status

approved