The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A004736 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A004736

Triangle read by rows: row n lists the first n positive integers in decreasing order.
(history; published version)

#186 by N. J. A. Sloane at Sat Nov 09 00:56:20 EST 2024

STATUS

reviewed

approved

#185 by Michel Marcus at Fri Nov 08 14:51:40 EST 2024

STATUS

proposed

reviewed

#184 by Chai Wah Wu at Fri Nov 08 14:27:25 EST 2024

STATUS

editing

proposed

#183 by Chai Wah Wu at Fri Nov 08 14:27:18 EST 2024

PROG

(Python)

from math import comb, isqrt

def A004736(n): return comb((m:=isqrt(k:=n<<1))+(k>m*(m+1))+1, 2)+1-n # Chai Wah Wu, Nov 08 2024

STATUS

approved

editing

#182 by Alois P. Heinz at Thu Oct 24 16:24:16 EDT 2024

STATUS

reviewed

approved

#181 by Stefano Spezia at Thu Oct 24 15:54:46 EDT 2024

STATUS

proposed

reviewed

#180 by Ruud H.G. van Tol at Wed Oct 23 13:08:34 EDT 2024

STATUS

editing

proposed

#179 by Ruud H.G. van Tol at Wed Oct 23 13:08:24 EDT 2024

CROSSREFS

Cf. A128174 (parity).

STATUS

approved

editing

#178 by Michael De Vlieger at Mon May 27 13:22:30 EDT 2024

STATUS

proposed

approved

#177 by R. J. Mathar at Mon May 27 11:05:35 EDT 2024

STATUS

editing

proposed