A138070 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

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

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Also, successive digits of A135697(n).

LINKS

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

EXAMPLE

Triangle begins:

3,3

3,1,3

3,1,1,3

3,1,4,1,3

MATHEMATICA

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

CROSSREFS

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

Sequence in context: A320085 A358691 A172368 * A081334 A106694 A183051

Adjacent sequences: A138067 A138068 A138069 * A138071 A138072 A138073

KEYWORD

easy,nonn,tabl,base,changed

AUTHOR

Omar E. Pol, Mar 03 2008

STATUS

approved