The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A202708 Sum of digits of n! divided by 9. 2
 1, 1, 1, 3, 3, 4, 3, 3, 5, 5, 7, 7, 6, 5, 6, 7, 8, 11, 9, 8, 9, 12, 10, 14, 13, 15, 12, 16, 16, 16, 19, 17, 12, 21, 21, 16, 21, 20, 24, 23, 24, 25, 26, 25, 24, 22, 31, 31, 29, 31, 37, 30, 32, 36, 32, 35, 34, 37, 36, 39, 39, 41, 38, 39, 51, 47, 48, 35, 42, 48 (list; graph; refs; listen; history; text; internal format)
 OFFSET 6,4 COMMENTS (sum of digits of n!) / 9 is an integer for n > 5. LINKS Seiichi Manyama, Table of n, a(n) for n = 6..10000 FORMULA a(n) = A004152(n)/9. MATHEMATICA Table[Sum[DigitCount[n!][[i]]*i/9, {i, 1, 9}], {n, 6, 100}] PROG (PARI) a(n) = sumdigits(n!)/9; \\ Michel Marcus, Aug 12 2022 CROSSREFS Cf. A004152, A086358. Sequence in context: A121937 A003034 A091282 * A027684 A276864 A342928 Adjacent sequences: A202705 A202706 A202707 * A202709 A202710 A202711 KEYWORD nonn,base,easy AUTHOR Michel Lagneau, Dec 23 2011 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 8 08:22 EST 2022. Contains 358693 sequences. (Running on oeis4.)