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A100154 Structured truncated icosahedral numbers. 3
1, 60, 282, 772, 1635, 2976, 4900, 7512, 10917, 15220, 20526, 26940, 34567, 43512, 53880, 65776, 79305, 94572, 111682, 130740, 151851, 175120, 200652, 228552, 258925, 291876, 327510, 365932, 407247, 451560, 498976, 549600 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

FORMULA

a(n) = (1/2)*n*(35*n^2-47*n+14).

G.f.: x*(1+56*x+48*x^2)/(1-x)^4. [Colin Barker, Feb 12 2012]

PROG

(MAGMA) [(1/6)*(105*n^3-141*n^2+42*n): n in [1..40]]; // Vincenzo Librandi, Jul 19 2011

CROSSREFS

Cf. A100153, A100155 for adjacent structured Archimedean solids; A100145 for more on structured polyhedral numbers.

Sequence in context: A100153 A059461 A160917 * A246230 A100148 A100151

Adjacent sequences:  A100151 A100152 A100153 * A100155 A100156 A100157

KEYWORD

easy,nonn

AUTHOR

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

STATUS

approved

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Last modified July 25 12:40 EDT 2017. Contains 289795 sequences.