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A054263 Number of palindromic triangular numbers with n digits. 5

%I

%S 3,2,3,3,2,2,6,2,1,4,7,0,4,4,12,5,6,2,3,2,6,3,6,2,2,4,3,2,5,0,3,2,1,4,

%T 3,1,10,1,4,0

%N Number of palindromic triangular numbers with n digits.

%H P. De Geest, <a href="http://www.worldofnumbers.com/triangle.htm">Palindromic Triangulars</a>

%e a(10) = 4: 1264114621, 1634004361, 5289009825, 6172882716.

%Y Cf. A000217, A003098, A008509, A008510.

%K nonn,base,hard

%O 1,1

%A _Patrick De Geest_, Apr 15 2000

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Last modified April 4 21:43 EDT 2020. Contains 333238 sequences. (Running on oeis4.)