The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A342323 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A342323

Square array read by ascending antidiagonals: T(n,k) = gcd(k, Phi_k(n)), where Phi_k is the k-th cyclotomic polynomial, n >= 0, k >= 1.
(history; published version)

#20 by Amiram Eldar at Fri Feb 09 10:36:22 EST 2024

STATUS

reviewed

approved

#19 by Stefano Spezia at Fri Feb 09 10:29:21 EST 2024

STATUS

proposed

reviewed

#18 by Stefano Spezia at Fri Feb 09 10:29:16 EST 2024

STATUS

editing

proposed

#17 by Stefano Spezia at Fri Feb 09 10:29:13 EST 2024

EXAMPLE

Table begins:

STATUS

proposed

editing

#16 by Paolo Xausa at Fri Feb 09 09:33:33 EST 2024

STATUS

editing

proposed

#15 by Paolo Xausa at Fri Feb 09 09:33:30 EST 2024

MATHEMATICA

Table[A342323[n-k+1, k], {n, 0, 1015}, {k, n+1}] (* Paolo Xausa, Feb 09 2024 *)

#14 by Paolo Xausa at Fri Feb 09 09:32:27 EST 2024

MATHEMATICA

A342323[n_, k_] := GCD[k, Cyclotomic[k, n]];

Table[A342323[n-k+1, k], {n, 0, 10}, {k, n+1}] (* Paolo Xausa, Feb 09 2024 *)

STATUS

approved

editing

#13 by Michel Marcus at Wed Mar 10 01:26:03 EST 2021

STATUS

reviewed

approved

#12 by Joerg Arndt at Wed Mar 10 01:10:34 EST 2021

STATUS

proposed

reviewed

#11 by Michel Marcus at Tue Mar 09 03:12:50 EST 2021

STATUS

editing

proposed

Discussion

Tue Mar 09

03:18

Jianing Song: Looks good