The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A021823 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A021823

Decimal expansion of 1/819.
(history; published version)

#50 by Michel Marcus at Mon Aug 05 05:17:14 EDT 2024

STATUS

reviewed

approved

#49 by Joerg Arndt at Mon Aug 05 04:44:26 EDT 2024

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proposed

reviewed

#48 by Jason Yuen at Mon Aug 05 04:20:56 EDT 2024

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editing

proposed

#47 by Jason Yuen at Mon Aug 05 04:20:40 EDT 2024

COMMENTS

Expansion in any base b >= 3 of 1/((b-1)*(b^2-b+1) ) = 1/(b^3-2b^2+2b-1). E.g., 1/14 in base 3, 1/39 in base 4, 1/84 in base 5, etc. - Franklin T. Adams-Watters, Nov 07 2006

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approved

editing

#46 by Joerg Arndt at Wed Dec 27 11:53:33 EST 2023

STATUS

editing

approved

#45 by Paolo P. Lava at Wed Dec 27 11:42:22 EST 2023

FORMULA

a(n) = (1/30)*{7*(n mod 6)+7*[(n+1) mod 6]+2*[(n+2) mod 6]-3*[(n+3) mod 6]-3*[(n+4) mod 6]+2*[(n+5) mod 6]}, with n>=0. - Paolo P. Lava, Jan 31 2008

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approved

editing

#44 by Michael De Vlieger at Tue Oct 24 23:16:43 EDT 2023

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reviewed

approved

#43 by Andrew Howroyd at Tue Oct 24 20:41:42 EDT 2023

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proposed

reviewed

#42 by Andrew Howroyd at Tue Oct 24 20:33:21 EDT 2023

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editing

proposed

#41 by Andrew Howroyd at Tue Oct 24 20:33:16 EDT 2023

CROSSREFS

Cf. A004642, A153130 (2^n mod 9).