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Search: id:A157823
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| -5, -1, -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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A156591=2,-7,6,-8,4,-12,... a(n) is companion to A154589=4,-1,-2,-4,-8,.For this kind ,companion of sequence b(n) is first differences a(n), second differences being b(n). Well known case: A131577 and A011782. a(n)+b(n)=A000079 or -A000079. a(n)=A154570(n+2)-A154570(n) ,A154570=1,3,-4,2,-6,-2,-14,. See sequence(s) identical to its p-th differences (A130785,A130781,A024495,A000749,A138112(linked to Fibonacci),A139761).
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CROSSREFS
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Sequence in context: A093316 A085758 A154529 this_sequence A159703 A059521 A011509
Adjacent sequences: A157820 A157821 A157822 this_sequence A157824 A157825 A157826
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KEYWORD
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sign,easy
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Mar 07 2009
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EXTENSIONS
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Edited by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Oct 11 2009
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