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

1,1

Comments

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

Links

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

Example

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

Mathematica

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

Crossrefs

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

Sequence in context: A353527 A220670 A264526 * A206400 A321129 A278265

Adjacent sequences: A138068 A138069 A138070 * A138072 A138073 A138074

Keyword

easy,nonn,tabf,base

Author

Omar E. Pol, Mar 03 2008

Status

approved