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A067427
Seventh column of triangle A067425.
4
1, 10, 280, 7840, 219520, 6146560, 172103680, 4818903040, 134929285120, 3778019983360, 105784559534080, 2961967666954240, 82935094674718720, 2322182650892124160, 65021114224979476480, 1820591198299425341440
OFFSET
0,2
FORMULA
a(n) = A067425(n+6, 6).
a(n) = 10*(4*7)^(n-1), n >= 1, a(0)=1.
G.f.: (1-18*x)/(1-28*x).
MATHEMATICA
LinearRecurrence[{28}, {1, 10}, 20] (* Paolo Xausa, Oct 16 2024 *)
PROG
(Magma) [Ceiling(10*(4*7)^(n-1)): n in [0..20]]; // Vincenzo Librandi, Oct 03 2011
CROSSREFS
Cf. A067426 (sixth column), A067428 (eighth column), A009972 (powers of 28).
Sequence in context: A290202 A203149 A117654 * A157713 A205824 A251580
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Jan 25 2002
STATUS
approved