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Search: id:A067412
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| 1, 5, 40, 320, 2560, 20480, 163840, 1310720, 10485760, 83886080, 671088640, 5368709120, 42949672960, 343597383680, 2748779069440, 21990232555520, 175921860444160, 1407374883553280, 11258999068426240
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OFFSET
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0,2
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COMMENT
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The fifth column gives [1,6,60,600,6000,60000,...].
a(n+1) = A157176(A016957(n)). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 24 2009]
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FORMULA
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a(n)= A067410(n+3, 3). a(n)= 5*8^(n-1), n>=1, a(0)=1.
G.f.: (1-3*x)/(1-8*x).
E.g.f. : (5exp(8x)+3)/8=exp(4x)(cosh(4x)+sinh(4x)/4) - Paul Barry (pbarry(AT)wit.ie), Nov 20 2003
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CROSSREFS
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Cf. A067411 (third column), A067413 (sixth column), A001018 (powers of 8).
Sequence in context: A073505 A145841 A123943 this_sequence A078846 A027259 A007036
Adjacent sequences: A067409 A067410 A067411 this_sequence A067413 A067414 A067415
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KEYWORD
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nonn,easy
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Jan 25 2002
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