|
Search: id:A100147
|
|
|
| A100147 |
|
Structured icosidodecahedral numbers. |
|
+0
5
|
|
| 1, 30, 135, 364, 765, 1386, 2275, 3480, 5049, 7030, 9471, 12420, 15925, 20034, 24795, 30256, 36465, 43470, 51319, 60060, 69741, 80410, 92115, 104904, 118825, 133926, 150255, 167860, 186789, 207090, 228811, 252000
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
Equals row sums of triangle A143254 & binomial transform of [1, 29, 76, 48, 0, 0, 0,...]. [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 02 2008]
|
|
FORMULA
|
a(n)=(1/6)*(48*n^3-60*n^2+18*n)
a(n) = A079588(n-1) = n(2n-1)(4n-3). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 02 2008]
|
|
CROSSREFS
|
Cf. A100146, A100148 for adjacent structured Archimedean solids; and A100145 for more on structured polyhedral numbers.
Adjacent sequences: A100144 A100145 A100146 this_sequence A100148 A100149 A100150
Sequence in context: A010744 A044362 A044743 this_sequence A079588 A117750 A064495
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
James A. Record (james.record(AT)gmail.com). Nov 07, 2004.
|
|
|
Search completed in 0.002 seconds
|
