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 A092094 a(n) = Sum_{i=0,1,2,..; n-k*i >= -n} |n-k*i| for k=3. 1
 7, 12, 18, 19, 27, 36, 37, 48, 60, 61, 75, 90, 91, 108, 126, 127, 147, 168, 169, 192, 216, 217, 243, 270, 271, 300, 330, 331, 363, 396, 397, 432, 468, 469, 507, 546, 547, 588, 630, 631, 675, 720, 721, 768, 816, 817, 867, 918, 919, 972, 1026, 1027, 1083, 1140 (list; graph; refs; listen; history; text; internal format)
 OFFSET 4,1 REFERENCES F. Smarandache, Back and Forth Factorials, Arizona State Univ., Special Collections, 1972. F. Smarandache, Back and Forth Summants, Arizona State Univ., Special Collections, 1972. LINKS J. Dezert, ed., Smarandacheials (1), Mathematics Magazine for Grades 1-12, No. 4, 2004. J. Dezert, ed., Smarandacheials (2), Mathematics Magazine for Grades 1-12, No. 4, 2004. F. Smarandache, Summants [Broken link] FORMULA S_abs(n, 3) = Sigma_{i=0, 1, 2, ...}_{0= -n do a := a+abs(n-k*i) ; i := i+1 ; od: RETURN(a) ; end: k := 3: seq(S(n, 3), n=k+1..80) ; # R. J. Mathar, Feb 01 2008 MATHEMATICA S[n_, k_] := Module[{a = 0, i = 0}, While[n - k i >= -n, a += Abs[n - k i]; i++]; a]; Table[S[n, 3], {n, 4, 80}] (* Jean-François Alcover, Apr 05 2020, from Maple *) CROSSREFS Cf. A001044, A092396, A092397, A092398, A092399, A092971, A092972, A092973, A092974. Sequence in context: A183046 A272785 A272808 * A064665 A142337 A131912 Adjacent sequences:  A092091 A092092 A092093 * A092095 A092096 A092097 KEYWORD nonn AUTHOR Jahan Tuten (jahant(AT)indiainfo.com), Mar 29 2004 EXTENSIONS Edited and extended by R. J. Mathar, Feb 01 2008 Definition clarified by N. J. A. Sloane, Jul 03 2017 STATUS approved

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Last modified May 22 02:18 EDT 2022. Contains 353933 sequences. (Running on oeis4.)