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 A060852 Sum of number of pips on dice in shape of Platonic solids. 3

%I

%S 10,21,36,78,210

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

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

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Dice">Dice</a>.

%e 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].

%t # (# + 1)/2 & /@ {4, 6, 8, 12, 20} (* _Robert G. Wilson v_, Apr 18 2008 *)

%o (Perl) for \$n (4, 6, 8, 12, 20) { print \$n*(\$n+1)/2 }

%Y Cf. A053016.

%K fini,full,nonn

%O 1,1

%A _Philip Newton_, Aug 09 2001

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Last modified February 17 10:59 EST 2019. Contains 320219 sequences. (Running on oeis4.)