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8, 128, 2048, 32768, 524288, 8388608, 134217728, 2147483648, 34359738368, 549755813888, 8796093022208, 140737488355328, 2251799813685248, 36028797018963968, 576460752303423488, 9223372036854775808
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..200
Tanya Khovanova, Recursive Sequences
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FORMULA
| a(n)=16*a(n-1), n>0 ; a(0)=8 . G.f.: 8/(1-16x). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 23 2008]
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PROG
| (Other) sage: [lucas_number1(4*n, 2, 0) for n in xrange(1, 17)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Oct 27 2009]
(MAGMA) [2^(4*n+3): n in [0..20]]; // Vincenzo Librandi, Jun 27 2011
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CROSSREFS
| Sequence in context: A105094 A036294 A133680 * A183497 A156270 A051189
Adjacent sequences: A013774 A013775 A013776 * A013778 A013779 A013780
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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