The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A333292

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A333292

Triangle read by rows: T(m,n) = Sum_{ 1 <= i <= m, 1 <= j <= n, gcd(i,j)=1 } i*j, for 1 <= n <= m.
(history; published version)

#29 by N. J. A. Sloane at Tue Mar 16 19:00:49 EDT 2021

STATUS

editing

approved

#28 by N. J. A. Sloane at Tue Mar 16 19:00:47 EDT 2021

CROSSREFS

Main diagonal is A319087.

STATUS

approved

editing

#27 by N. J. A. Sloane at Wed Mar 25 15:08:15 EDT 2020

STATUS

editing

approved

#26 by N. J. A. Sloane at Wed Mar 25 15:08:13 EDT 2020

CROSSREFS

Cf. A320541.

STATUS

approved

editing

#25 by N. J. A. Sloane at Wed Mar 25 15:07:42 EDT 2020

STATUS

editing

approved

#24 by N. J. A. Sloane at Wed Mar 25 15:07:19 EDT 2020

NAME

Triangle read by rows: T(m,n) (1 <= n <= m) = Sum_{ 1 <= i <= m, 1 <= j <= n, gcd(i,j)=1 } i*j, for 1 <= n <= m.

STATUS

approved

editing

#23 by N. J. A. Sloane at Mon Mar 23 12:15:29 EDT 2020

STATUS

editing

approved

#22 by Alois P. Heinz at Mon Mar 23 07:38:42 EDT 2020

LINKS

Alois P. Heinz, <a href="/A333292/b333292.txt">Table of n, a(n) for Rows n = 1..10011141, flattened</a>

STATUS

proposed

editing

Discussion

Mon Mar 23

07:57

Andrey Zabolotskiy: Neil, please take a look at your A332360 and A332362 -- are they still under construction?

#21 by Alois P. Heinz at Mon Mar 23 07:03:31 EDT 2020

STATUS

editing

proposed

#20 by Alois P. Heinz at Mon Mar 23 07:03:22 EDT 2020

LINKS

Alois P. Heinz, <a href="/A333292/b333292.txt">Table of n, a(n) for n = 1..10011</a>

MAPLE

T:= (m, n)-> add(add(`if`(igcd(i, j)=1, i*j, 0), j=1..n), i=1..m):

seq(seq(T(m, n), n=1..m), m=1..12); # Alois P. Heinz, Mar 23 2020

STATUS

reviewed

editing