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

10, 21, 36, 78, 210

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 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

Cf. A053016.

Sequence in context: A164714 A324600 A240536 * A345962 A195142 A256884

Adjacent sequences: A060849 A060850 A060851 * A060853 A060854 A060855

Keyword

fini,full,nonn

Author

Philip Newton, Aug 09 2001

Status

approved