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A095709 Triangle of numbers obtained by reversing the first n digits of Pi and juxtaposing. 0
3, 1, 3, 4, 1, 3, 1, 4, 1, 3, 5, 1, 4, 1, 3, 9, 5, 1, 4, 1, 3, 2, 9, 5, 1, 4, 1, 3, 6, 2, 9, 5, 1, 4, 1, 3, 5, 6, 2, 9, 5, 1, 4, 1, 3, 3, 5, 6, 2, 9, 5, 1, 4, 1, 3, 5, 3, 5, 6, 2, 9, 5, 1, 4, 1, 3, 8, 5, 3, 5, 6, 2, 9, 5, 1, 4, 1, 3, 9, 8, 5, 3, 5, 6, 2, 9, 5, 1, 4, 1, 3, 7, 9, 8, 5, 3, 5, 6, 2, 9, 5, 1, 4, 1, 3 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..105.

EXAMPLE

3; 1,3; 4,1,3; 1,4,1,3; 5,1,4,1,3;... (reverse order of 3; 3.1; 3.14; 3.141; 3.1415; ...)

MATHEMATICA

Module[{nn=20, pid}, pid=RealDigits[Pi, 10, (nn(nn+1))/2][[1]]; Table[ Reverse[ Take[ pid, n]], {n, nn}]]//Flatten (* Harvey P. Dale, Aug 13 2019 *)

PROG

(PARI) a(n)=if(n<1, 0, default(realprecision, n+2); floor(Pi*10^(n-1))%10); b(n)=1+binomial(1+floor(1/2+sqrt(2*n)), 2)-n; for(n=1, 120, print1(a(b(n)), ", ")

CROSSREFS

Cf. A000796.

Sequence in context: A130560 A088105 A030708 * A076152 A107638 A245093

Adjacent sequences:  A095706 A095707 A095708 * A095710 A095711 A095712

KEYWORD

base,easy,nonn,tabl

AUTHOR

Herman Jamke (hermanjamke(AT)fastmail.fm), Jul 07 2004

STATUS

approved

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Last modified May 18 10:19 EDT 2021. Contains 343995 sequences. (Running on oeis4.)