The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History forA090129

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A090129

Smallest exponent such that -1 + 3^a(n) is divisible by 2^n.
(history; published version)

#44byMichael De Vliegerat Wed May 01 09:02:06 EDT 2024

STATUS

proposed

approved

#43byMichel Marcusat Wed May 01 07:45:25 EDT 2024

STATUS

editing

proposed

#42byMichel Marcusat Wed May 01 07:45:05 EDT 2024

COMMENTS

a(n+2)=A152046(n)+A152046(n+1)=2*A011782(n).A131577andA011782are companions,A131577(n) +A011782(n) = 2^n, (and differences each other). -Paul Curtz,Jan 18 2009

FORMULA

a(n+2) =A152046(n) +A152046(n+1) = 2*A011782(n). -Paul Curtz,Jan 18 2009

STATUS

proposed

editing

#41byHugo Pfoertnerat Wed May 01 06:17:56 EDT 2024

STATUS

editing

proposed

#40byHugo Pfoertnerat Wed May 01 06:17:18 EDT 2024

DATA

1, 2, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, 67108864, 134217728, 268435456,536870912,1073741824,2147483648,4294967296,8589934592,17179869184

STATUS

approved

editing

Discussion

Wed May 01

06:17

Hugo Pfoertner:Usual length of DATA.

#39byJoerg Arndtat Mon Jul 11 11:14:46 EDT 2022

STATUS

reviewed

approved

#38byMichel Marcusat Mon Jul 11 10:47:40 EDT 2022

STATUS

proposed

reviewed

#37byChai Wah Wuat Mon Jul 11 10:46:48 EDT 2022

STATUS

editing

proposed

#36byChai Wah Wuat Mon Jul 11 10:46:45 EDT 2022

PROG

(Python)

defA090129(n): return n if n<3 else 1<<n-2 #Chai Wah Wu,Jul 11 2022

STATUS

approved

editing

#35byN. J. A. Sloaneat Mon Sep 04 23:26:32 EDT 2017

STATUS

proposed

approved