OFFSET
1,1
COMMENTS
This is obviously a finite sequence, since there are only five Platonic solids.
LINKS
Wikipedia, Dice.
EXAMPLE
The third number in the sequence is 36 because the third Platonic solid has eight faces and the pips on an eight-faced die add up to 36 [by sum_1^n(n) = 1/2 * n * (n+1), so 1/2 * 8 * 9 = 36 for n = 8].
MATHEMATICA
# (# + 1)/2 & /@ {4, 6, 8, 12, 20} (* Robert G. Wilson v, Apr 18 2008 *)
PROG
(Perl) for $n (4, 6, 8, 12, 20) { print $n*($n+1)/2 }
CROSSREFS
KEYWORD
fini,full,nonn
AUTHOR
Philip Newton, Aug 09 2001
STATUS
approved