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A067420
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Fifth column of triangle A067417.
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3
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1, 7, 105, 1575, 23625, 354375, 5315625, 79734375, 1196015625, 17940234375, 269103515625, 4036552734375, 60548291015625, 908224365234375, 13623365478515625, 204350482177734375, 3065257232666015625
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..800
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FORMULA
| a(n)= A067417(n+4, 4). a(n)= 7*(3*5)^(n-1), n>=1, a(0)=1.
G.f.: (1-8*x)/(1-15*x).
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PROG
| (MAGMA) [Ceiling(7*(3*5)^(n-1)): n in [0..20]]; // Vincenzo Librandi, Oct 02 2011
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CROSSREFS
| Cf. A067419 (fourth column), A067421 (sixth column), A001024 (powers of 15).
Sequence in context: A093741 A139742 A120049 * A131869 A132867 A145666
Adjacent sequences: A067417 A067418 A067419 * A067421 A067422 A067423
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KEYWORD
| nonn,easy
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AUTHOR
| Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Jan 25 2002
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