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A100166 Structured deltoidal hexacontahedral numbers (vertex structure 9). 3
1, 62, 295, 812, 1725, 3146, 5187, 7960, 11577, 16150, 21791, 28612, 36725, 46242, 57275, 69936, 84337, 100590, 118807, 139100, 161581, 186362, 213555, 243272, 275625, 310726, 348687, 389620, 433637, 480850, 531371, 585312 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

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

FORMULA

a(n) = (1/6)*(112*n^3-156*n^2+50*n).

G.f.: x*(1+58*x+53*x^2)/(1-x)^4. - Colin Barker, Jan 19 2012

PROG

(MAGMA) [(1/6)*(112*n^3-156*n^2+50*n): n in [1..40]]; // Vincenzo Librandi, Jul 26 2011

CROSSREFS

Cf. A100158, A100159 = alternate vertices; A100145 for more on structured numbers.

Sequence in context: A158067 A045220 A100158 * A100159 A100160 A010746

Adjacent sequences:  A100163 A100164 A100165 * A100167 A100168 A100169

KEYWORD

nonn,easy

AUTHOR

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

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Last modified February 17 13:28 EST 2012. Contains 206031 sequences.