A138070 Triangle read by rows: row n lists the successive digits of A135697(n), the palindromic number formed from the reflected decimal expansion of Pi.

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

Offset: 1

Author

Omar E. Pol, Mar 03 2008

Keywords

• easy
• nonn
• tabl
• base

Comments

Also, successive digits of A135697(n).

Examples

			Triangle begins:
      3
     3,3
    3,1,3
   3,1,1,3
  3,1,4,1,3
		

Links

• Paolo Xausa, Table of n, a(n) for n = 1..11325 (rows 1..150 of triangle, flattened).

Crossrefs

Decimal expansion of Pi: A000796. Cf. A135697, A135698, A138071.

Programs

Mathematica

Table[Join[#[[;; Floor[n/2]]], #[[Ceiling[n/2] ;; 1 ;; -1]]], {n, Length[#]}] & [First[RealDigits[Pi, 10, 15]]] (* Paolo Xausa, Dec 09 2024 *)