A138071 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.

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, 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, 5, 9, 2, 6, 5, 6, 2, 9, 5, 1, 4, 1, 3

Offset: 1

Author

Omar E. Pol, Mar 03 2008

Keywords

• easy
• nonn
• tabf
• base

Comments

Also, successive digits of the numbers A135698(n).

Examples

			Triangle begins:
              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
		

Links

• Paolo Xausa, Table of n, a(n) for n = 1..10000 (rows 1..100 of triangle, flattened).

Crossrefs

Decimal expansion of Pi: A000796. Cf. A119351, A135697, A135698, A138070.

Programs

Mathematica

Table[Join[#[[;; n - 1]], #[[n ;; 1 ;; -1]]], {n, Length[#]}] & [First[RealDigits[Pi, 10, 15]]] (* Paolo Xausa, Dec 08 2024 *)