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A016312
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Expansion of 1/((1-2x)(1-7x)(1-9x)).
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1, 18, 229, 2538, 26197, 259290, 2498293, 23637546, 220808533, 2043771642, 18789409717, 171872944074, 1566234297109, 14231753285274, 129035291862901, 1167964212866922, 10558204018573525, 95349518886691386
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(n) =((9^n - 2^n)/7-(7^n - 2^n)/5)/2 n>=2 [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 05 2009]
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PROG
| (Other) sage: [((9^n - 2^n)/7-(7^n - 2^n)/5)/2 for n in xrange(2, 20)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 05 2009]
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CROSSREFS
| Sequence in context: A021384 A056950 A021144 * A017916 A016307 A193982
Adjacent sequences: A016309 A016310 A016311 * A016313 A016314 A016315
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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