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Revision History for A275019 (Underlined text is an addition; strikethrough text is a deletion.)

Showing entries 1-10 | older changes
A275019 2-adic valuation of tetrahedral numbers C(n+2,3) = n(n+1)(n+2)/6 = A000292.
(history; published version)
#37 by Michael De Vlieger at Fri Jul 08 08:21:22 EDT 2022
STATUS

reviewed

approved

#36 by Michel Marcus at Fri Jul 08 01:20:34 EDT 2022
STATUS

proposed

reviewed

#35 by Jon E. Schoenfield at Thu Jul 07 19:11:03 EDT 2022
STATUS

editing

proposed

#34 by Jon E. Schoenfield at Thu Jul 07 19:11:01 EDT 2022
PROG

(MAGMAMagma) [Valuation(n*(n+1)*(n+2)/6, 2): n in [1..100]]; // Vincenzo Librandi, Dec 04 2016

STATUS

proposed

editing

#33 by Chai Wah Wu at Thu Jul 07 19:02:08 EDT 2022
STATUS

editing

proposed

#32 by Chai Wah Wu at Thu Jul 07 19:02:06 EDT 2022
PROG

(Python)

def A275019(n): return (~(m:=n*(n+1)*(n+2)//6)& m-1).bit_length() # Chai Wah Wu, Jul 07 2022

STATUS

approved

editing

#31 by Wesley Ivan Hurt at Mon Dec 05 17:12:56 EST 2016
STATUS

proposed

approved

#30 by Michel Marcus at Mon Dec 05 16:19:33 EST 2016
STATUS

editing

proposed

#29 by Michel Marcus at Mon Dec 05 16:19:27 EST 2016
FORMULA

From Robert Israel, Dec 04 2016: (XtartStart)

STATUS

approved

editing

#28 by N. J. A. Sloane at Sun Dec 04 09:33:26 EST 2016
STATUS

editing

approved

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Last modified August 29 08:01 EDT 2024. Contains 375510 sequences. (Running on oeis4.)