The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A087192 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A087192

a(n) = ceiling(a(n-1)*4/3), with a(1) = 1.
(history; published version)

#34 by N. J. A. Sloane at Mon Jun 03 18:19:11 EDT 2024

STATUS

proposed

approved

#33 by Jon E. Schoenfield at Mon Jun 03 01:05:21 EDT 2024

STATUS

editing

proposed

#32 by Jon E. Schoenfield at Mon Jun 03 01:02:56 EDT 2024

CROSSREFS

Cf. A072493, A087165, A155167.

STATUS

approved

editing

Discussion

Mon Jun 03

01:05

Jon E. Schoenfield: a(n) = A155167(n-1)+1?

#31 by Michael De Vlieger at Thu Sep 07 12:47:54 EDT 2023

STATUS

reviewed

approved

#30 by Michel Marcus at Thu Sep 07 12:26:37 EDT 2023

STATUS

proposed

reviewed

#29 by Chai Wah Wu at Thu Sep 07 12:24:05 EDT 2023

STATUS

editing

proposed

#28 by Chai Wah Wu at Thu Sep 07 12:23:56 EDT 2023

PROG

(Python)

from fractions import Fraction

from functools import lru_cache

@lru_cache(maxsize=None)

def A087192(n): return int(Fraction(4*A087192(n-1), 3).__ceil__()) if n>1 else 1 # Chai Wah Wu, Sep 07 2023

STATUS

approved

editing

#27 by Charles R Greathouse IV at Thu Sep 08 08:45:11 EDT 2022

PROG

(MAGMAMagma) [n eq 1 select 1 else Ceiling(Self(n-1)*4/3): n in [1..50]]; // Vincenzo Librandi, Aug 17 2017

Discussion

Thu Sep 08

08:45

OEIS Server: https://oeis.org/edit/global/2944

#26 by Paul D. Hanna at Thu Aug 17 14:26:12 EDT 2017

STATUS

reviewed

approved

#25 by Joerg Arndt at Thu Aug 17 03:06:07 EDT 2017

STATUS

proposed

reviewed