OFFSET
1,2
COMMENTS
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
FORMULA
O.g.f.: x*(100x^4 + 200x^3 + 83x^2 + 20x + 1)/((10x-1)(100x^2+1)(x-1)(x^2+1)). - R. J. Mathar, Apr 09 2008
MATHEMATICA
Module[{nn=20}, FromDigits/@TakeList[PadRight[{}, (nn(nn+1))/2, {1, 3}], Range[ nn]]] (* Harvey P. Dale, Aug 04 2021 *)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Ctibor O. Zizka, Apr 06 2008
EXTENSIONS
More terms from R. J. Mathar, Apr 09 2008
STATUS
approved