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0, 1, 14, 54, 136, 275, 486, 784, 1184, 1701, 2350, 3146, 4104, 5239, 6566, 8100, 9856, 11849, 14094, 16606, 19400, 22491, 25894, 29624, 33696, 38125, 42926, 48114, 53704, 59711, 66150, 73036, 80384, 88209, 96526, 105350, 114696, 124579, 135014, 146016
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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COMMENTS
| Structured heptagonal prism numbers. - James A. Record (james.record(AT)gmail.com). Nov. 7, 2004.
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REFERENCES
| W. A. Whitworth, DCC Exercises in Choice and Chance, Stechert, NY, 1945, p. 29.
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..10000
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FORMULA
| a(n)=(1/6)*(15*n^3-9*n^2) - James A. Record (james.record(AT)gmail.com). Nov. 7, 2004.
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PROG
| (MAGMA [n^2*(5*n-3)/2: n in [0..40]]; // Vincenzo Librandi, Jul 20 2011
(PARI) a(n)=n^2*(5*n-3)/2;
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CROSSREFS
| Cf. A100177 - structured prisms; A100145 for more on structured numbers.
Sequence in context: A118856 A118530 A048971 * A114012 A140784 A022285
Adjacent sequences: A006594 A006595 A006596 * A006598 A006599 A006600
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KEYWORD
| easy,nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| Name corrected by Arkadiusz Wesolowski, Jul 20 2011
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