OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
FORMULA
MATHEMATICA
Total[IntegerDigits[#]]&/@Table[(n(n+1)(n+2))/6, {n, 80}] (* Harvey P. Dale, Jul 31 2013 *)
PROG
(PARI) a(n)=sumdigits(n*(n+1)*(n+2)/6) \\ Charles R Greathouse IV, Dec 19 2016
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved