A100163 Structured disdyakis dodecahedral numbers (vertex structure 5).

1, 26, 119, 324, 685, 1246, 2051, 3144, 4569, 6370, 8591, 11276, 14469, 18214, 22555, 27536, 33201, 39594, 46759, 54740, 63581, 73326, 84019, 95704, 108425, 122226, 137151, 153244, 170549, 189110, 208971, 230176

Offset

1,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

Formula

a(n) = (1/6)*(44*n^3 - 60*n^2 + 22*n).

G.f.: x*(1 + 22*x + 21*x^2)/(1-x)^4. - Colin Barker, Jan 19 2012

Prog

(Magma) [(1/6)*(44*n^3-60*n^2+22*n): n in [1..40]]; // Vincenzo Librandi, Jul 25 2011

Crossrefs

Cf. A100161, A100162 = alternate vertices; A100145 for more on structured polyhedral numbers.

Sequence in context: A100161 A100162 A051729 * A296325 A183066 A124954

Adjacent sequences: A100160 A100161 A100162 * A100164 A100165 A100166

Keyword

nonn,easy

Author

James A. Record (james.record(AT)gmail.com), Nov 07 2004

Status

approved