The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A036843 Floor(X/Y), where X = concatenation of the triangular numbers and Y = concatenation of natural numbers. 0
 1, 1, 1, 11, 110, 1102, 11024, 110242, 1102422, 1102422, 1102422, 1102422, 1102422, 11024223, 110242233, 1102422331, 11024223315, 110242233152, 1102422331526, 11024223315266, 110242233152667, 1102422331526679 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS a(n) -> 11024223315266792255432504568329867353511401594905438085.... LINKS MATHEMATICA f[n_] := (k = 1; x = y = "0"; While[k < n + 1, x = StringJoin[x, ToString[k(k+1)/2]]; y = StringJoin[y, ToString[k]]; k++ ]; Return[ Floor[ ToExpression[x] / ToExpression[y]]] ); Table[ f[n], {n, 1, 25} ] Module[{nn=30, trs, nts}, trs=IntegerDigits/@Accumulate[Range[nn]]; nts= IntegerDigits/@ Range[nn]; Table[Floor[ FromDigits[Flatten[ Take[trs, n]]]/ FromDigits[ Flatten[ Take[nts, n]]]], {n, nn}]] (* Harvey P. Dale, Jul 15 2017 *) CROSSREFS Cf. A007908. Sequence in context: A109217 A266680 A320890 * A299301 A278786 A279826 Adjacent sequences:  A036840 A036841 A036842 * A036844 A036845 A036846 KEYWORD nonn,base,less AUTHOR Robert G. Wilson v, Jan 09 2002 EXTENSIONS Edited by Charles R Greathouse IV, Apr 28 2010 STATUS approved

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

Last modified August 11 18:37 EDT 2020. Contains 336428 sequences. (Running on oeis4.)