%I #15 Dec 08 2024 16:07:16
%S 3,3,1,3,3,1,4,1,3,3,1,4,1,4,1,3,3,1,4,1,5,1,4,1,3,3,1,4,1,5,9,5,1,4,
%T 1,3,3,1,4,1,5,9,2,9,5,1,4,1,3,3,1,4,1,5,9,2,6,2,9,5,1,4,1,3,3,1,4,1,
%U 5,9,2,6,5,6,2,9,5,1,4,1,3
%N Triangle read by rows: row n lists the digits of A135698(n), the palindromic number with odd number of digits formed from the reflected decimal expansion of Pi.
%C Also, successive digits of the numbers A135698(n).
%H Paolo Xausa, <a href="/A138071/b138071.txt">Table of n, a(n) for n = 1..10000</a> (rows 1..100 of triangle, flattened).
%e Triangle begins:
%e 3
%e 3, 1, 3
%e 3, 1, 4, 1, 3
%e 3, 1, 4, 1, 4, 1, 3
%e 3, 1, 4, 1, 5, 1, 4, 1, 3
%t Table[Join[#[[;; n - 1]], #[[n ;; 1 ;; -1]]], {n, Length[#]}] & [First[RealDigits[Pi, 10, 15]]] (* _Paolo Xausa_, Dec 08 2024 *)
%Y Decimal expansion of Pi: A000796. Cf. A119351, A135697, A135698, A138070.
%K easy,nonn,tabf,base
%O 1,1
%A _Omar E. Pol_, Mar 03 2008