A050819 -id:A050819 - cp's OEIS frontend

A035331 Base-1000 expansion of Pi.

3, 141, 592, 653, 589, 793, 238, 462, 643, 383, 279, 502, 884, 197, 169, 399, 375, 105, 820, 974, 944, 592, 307, 816, 406, 286, 208, 998, 628, 34, 825, 342, 117, 67, 982, 148, 86, 513, 282, 306, 647, 93, 844, 609, 550, 582, 231, 725, 359, 408, 128, 481, 117, 450

Offset: 0

Jörg Zurkirchen

Start with a(0)=3; other terms are formed from triples of successive digits in the decimal expansion of Pi.

This sequence can be considered as a (pseudo)random generator with range 0..999. Its scatterplot graph is very similar to that of other random generators, e.g., A096558. - M. F. Hasler, May 14 2015

			Pi = 3.141 592 653 589 793 238 462 643 383 279 502 884 197 169 399 375 105 ...

T. D. Noe, Table of n, a(n) for n = 0..10000

Cf. A000796, A016062, A037244, A050819, A032445, A064467.

RealDigits[Pi,1000,60][[1]] (* Harvey P. Dale, Nov 22 2015 *)

default(realprecision,3*N=100);vector(N,i,Pi\1000^(1-i)%1000) \\ or: {P=Pi;vector(N,i,P\1+0*P=frac(P)*1000)} or {P=Pi/1000;vector(N,i,floor(P=frac(P)*1000))}. \\ M. F. Hasler, May 11 2015

a(n) = floor(Pi*10^(3n)) mod 1000. - M. F. Hasler, May 14 2015

More terms from Larry Reeves (larryr(AT)acm.org), Oct 04 2001

Better definition from Franklin T. Adams-Watters, Apr 10 2006

A050807 Increasing even numbers seen in decimal expansion of Pi (disregarding the decimal period) contiguous, smallest and distinct.

Original entry on oeis.org

314, 1592, 65358, 97932, 384626, 433832, 795028, 8419716, 939937510, 5820974944, 59230781640, 62862089986, 280348253421170, 679821480865132, 8230664709384460, 955058223172535940, 8128481117450284102, 70193852110555964462, 2948954930381964428810

Offset: 1

Patrick De Geest, Oct 15 1999

Leading zero not allowed thus forcing continuation of previous term.

Carlos Rivera, Problem 18. Pi as a concatenation of the smallest contiguous different primes, The Prime Puzzles & Problems Connection.

Cf. A000796, A047777, A050817, A016062, A050818, A050819.

More terms from Sean A. Irvine, Aug 19 2021

A050818 Even numbers seen in decimal expansion of Pi (disregarding the decimal period) contiguous, smallest and distinct.

Original entry on oeis.org

314, 1592, 6, 5358, 97932, 38, 4, 62, 64, 338, 32, 7950, 2, 8, 84, 19716, 939937510, 58, 20, 974, 94, 4592, 30, 78, 16, 40, 628, 620, 8998, 6280, 34, 82, 534, 21170, 6798, 214, 80, 86, 5132, 8230, 66, 470, 938, 44, 60, 9550, 582, 23172, 53594, 0, 812, 848

Offset: 1

Patrick De Geest, Oct 15 1999

Leading zero not allowed thus forcing continuation of previous term.

C. Rivera, Problem 18, The Prime Puzzles & Problems Connection.

Cf. A047777, A050817, A016062, A050819, A050807.

A195834 Increasing primes formed from the decimal expansion of Pi, contiguous and smallest.

Original entry on oeis.org

3, 14159, 26535897932384626433832795028841971693993751058209, 74944592307816406286208998628034825342117067982148086513282306647093

Offset: 1

Omar E. Pol, Oct 21 2011

Leading zero not allowed thus forcing continuation of previous term. All digits of pi are in the concatenion of all terms of this sequence.

Cf. A000796, A005042, A047777, A050819.

a(n) < a(n+1).

More terms from D. S. McNeil, Oct 22 2011

A050817 Odd numbers seen in decimal expansion of Pi (disregarding the decimal period) contiguous, smallest and distinct.

Original entry on oeis.org

3, 1, 41, 5, 9, 265, 35, 89, 7, 93, 23, 8462643, 383, 27, 95028841, 97, 169, 39, 937, 5105, 8209, 749, 445, 92307, 81, 64062862089, 9862803, 4825, 3421, 17067, 9821, 480865, 13, 28230664709, 3844609, 5505, 8223, 17, 25, 359, 4081, 28481, 11

Offset: 1

Patrick De Geest, Oct 15 1999

Leading zero not allowed thus forcing continuation of previous term.

C. Rivera, Problem 18, The Prime Puzzles & Problems Connection.

Cf. A047777, A050818, A016062, A050819, A050807.

cp's OEIS Frontend

A035331 Base-1000 expansion of Pi.

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A050807 Increasing even numbers seen in decimal expansion of Pi (disregarding the decimal period) contiguous, smallest and distinct.

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Extensions

A050818 Even numbers seen in decimal expansion of Pi (disregarding the decimal period) contiguous, smallest and distinct.

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A195834 Increasing primes formed from the decimal expansion of Pi, contiguous and smallest.

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Author

Keywords

Comments

Crossrefs

Formula

Extensions

A050817 Odd numbers seen in decimal expansion of Pi (disregarding the decimal period) contiguous, smallest and distinct.

Views

Author

Keywords

Comments

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