OFFSET
1,1
COMMENTS
Oblong numbers are also called promic, pronic or heteromecic (numbers).
MATHEMATICA
Module[{nn=20, c}, c=2*Accumulate[Range[nn]]; Table[FromDigits[ Flatten[ IntegerDigits/@ Take[c, n]]], {n, nn}]] (* Harvey P. Dale, Sep 06 2015 *)
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Omar E. Pol, Nov 26 2007
STATUS
approved