A195903 Numbers m such that m-th centered triangular number is a palindrome.
1, 2, 101, 174, 211, 249, 257, 1822, 2070, 20795, 9531980, 17880587, 215198695, 1702002467, 167526192487, 196759830168, 2036493584526, 17476134422427, 82406037714600, 170438376135142, 181002188703854, 189344689666188, 213031868452710, 10020895012660701, 17108271682888342
Offset: 1
Links
- Patrick De Geest, Table of n, a(n) for n = 1..30
- Terry Trotter, Polygonal numbers [numbers >=920 on this page were incorrect when accessed Sep 25 2011]
- Terry Trotter, Polygonal Numbers, from the Wayback machine
- Patrick De Geest, Palindromic Centered Polygonal Numbers
Extensions
a(14) from D. S. McNeil, Sep 26 2011
a(15)-a(17) from Donovan Johnson, Sep 29 2011
a(18)-a(30) from Patrick De Geest, May 23 2021
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