OFFSET
1,4
LINKS
David A. Corneth, Table of n, a(n) for n = 1..10000
FORMULA
EXAMPLE
t(4) is 20 and 20 is divisible by t(1)=1, t(2)=4 and t(3)=10, so a(4)=3.
PROG
(PARI) t(n) = n*(n+1)*(n+2)/6;
a(n) = my(tn=n*(n+1)*(n+2)/6); sum(k=1, n-1, (tn % t(k)) == 0); \\ Michel Marcus, Sep 27 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Torlach Rush, Aug 28 2018
STATUS
approved