OFFSET
3,1
LINKS
Eric Weisstein's World of Mathematics, Polygonal Number
EXAMPLE
For n = 3: 190 = 1 + 36 + 153 = 15 + 55 + 120 = 21 + 78 + 91.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Ilya Gutkovskiy, Dec 31 2021
STATUS
approved