OFFSET
1,2
COMMENTS
FORMULA
a(n) = floor(((9*t^2 - 189*t + 18*n + 182) * (10^t - 1) - 18*t) / 162), where t = floor((21 - sqrt(369 - 8*n)) / 2). - Christopher J. Thomas, Feb 14 2024
MATHEMATICA
Table[FromDigits/@Partition[Range[9], n, 1], {n, 9}]//Flatten (* Harvey P. Dale, Mar 19 2017 *)
CROSSREFS
KEYWORD
base,easy,fini,full,nonn
AUTHOR
Omar E. Pol, Mar 19 2008
STATUS
approved