The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A007953 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A007953

Digital sum (i.e., sum of digits) of n; also called digsum(n).
(history; published version)

#286 by Alois P. Heinz at Sat Aug 03 17:06:10 EDT 2024

STATUS

proposed

approved

#285 by Jason Yuen at Sat Aug 03 16:08:19 EDT 2024

STATUS

editing

proposed

#284 by Jason Yuen at Sat Aug 03 16:08:15 EDT 2024

FORMULA

a(n) <= 9*(1 + floor(log_10(n)), ), equality holds for n = 10^m - 1, m > 0.

STATUS

approved

editing

#283 by Michael De Vlieger at Fri May 17 15:27:57 EDT 2024

STATUS

proposed

approved

#282 by Paolo Xausa at Fri May 17 11:19:32 EDT 2024

STATUS

editing

proposed

#281 by Paolo Xausa at Fri May 17 11:18:30 EDT 2024

MATHEMATICA

DigitSum[Range[0, 100]] (* Requires v. 14 *) (* Paolo Xausa, May 17 2024 *)

STATUS

approved

editing

#280 by Michael De Vlieger at Sun Jun 18 11:41:19 EDT 2023

STATUS

reviewed

approved

#279 by Joerg Arndt at Sun Jun 18 11:18:24 EDT 2023

STATUS

proposed

reviewed

#278 by Robert C. Lyons at Sun Jun 18 09:50:22 EDT 2023

STATUS

editing

proposed

#277 by Robert C. Lyons at Sun Jun 18 09:50:18 EDT 2023

PROG

(Swift 5)

STATUS

approved

editing