

A060852


Sum of number of pips on dice in shape of Platonic solids.


3




OFFSET

1,1


COMMENTS

This is obviously a finite sequence, since there are only five Platonic solids.


LINKS

Table of n, a(n) for n=1..5.
Wikipedia, Dice.


EXAMPLE

The third number in the sequence is 36 because the third Platonic solid has eight faces and the pips on an eightfaced 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

Cf. A053016.
Sequence in context: A075846 A164714 A240536 * A195142 A256884 A089584
Adjacent sequences: A060849 A060850 A060851 * A060853 A060854 A060855


KEYWORD

fini,full,nonn


AUTHOR

Philip Newton, Aug 09 2001


STATUS

approved



