OFFSET
0,2
LINKS
Ray Chandler, Table of n, a(n) for n = 0..50
FORMULA
a(n) = 7*n*A256287(n).
EXAMPLE
For n=2 there are 15 partitions of 7*2 = 14, so a(2) = 15*14 = 210.
MATHEMATICA
Plus @@ Total /@ IntegerPartitions[7 #, {7}] & /@ Range[0, 24] (* Michael De Vlieger, Mar 21 2015 *)
PROG
(PARI) concat(0, vector(35, n, k=0; forpart(p=7*n, k++, , [7, 7]); 7*n*k))
CROSSREFS
KEYWORD
nonn
AUTHOR
Colin Barker, Mar 21 2015
STATUS
approved