The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A073423

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

A073423

Sums of two powers of zero: triangle read by rows: T(m,n) = 0^n + 0^m, n >= 0, m = 0..n.
(history; published version)

#30 by Alois P. Heinz at Sat Nov 09 11:54:00 EST 2024

STATUS

proposed

approved

#29 by Chai Wah Wu at Sat Nov 09 11:48:57 EST 2024

STATUS

editing

proposed

#28 by Chai Wah Wu at Sat Nov 09 11:48:53 EST 2024

PROG

(Python)

from math import isqrt

def A073423(n): return int((k:=n<<1)==(m:=isqrt(k))*(m+1)) if n else 2 # Chai Wah Wu, Nov 09 2024

STATUS

approved

editing

#27 by Michael De Vlieger at Thu Nov 10 07:40:34 EST 2022

STATUS

reviewed

approved

#26 by Michel Marcus at Thu Nov 10 06:03:33 EST 2022

STATUS

proposed

reviewed

#25 by Michel Marcus at Sun Nov 06 10:17:35 EST 2022

STATUS

editing

proposed

#24 by Michel Marcus at Sun Nov 06 10:17:22 EST 2022

EXAMPLE

Triangle begins:

2;

1, 0;

1, 0, 0;

1, 0, 0, 0;

1, 0, 0, 0, 0;

1, 0, 0, 0, 0, 0;

...

STATUS

proposed

editing

#23 by Mohammad K. Azarian at Sat Nov 05 16:33:22 EDT 2022

STATUS

editing

proposed

#22 by Mohammad K. Azarian at Sat Nov 05 12:11:24 EDT 2022

LINKS

Mohammad K. Azarian, <a href="https://doi.org/10.12988/imf.2022.912321">Remarks and Conjectures Regarding Combinatorics of Discrete Partial Functions</a>, Int'l Math. Forum (2022) Vol. 17, No. 3, 129-141. See Conjecture 4.9, p. 138.

STATUS

approved

editing

#21 by Alois P. Heinz at Wed Jul 28 03:45:47 EDT 2021

STATUS

editing

approved