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arXiv 1105.0086math.NTcs.DM
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Stern序列的模式序列方法

A Pattern Sequence Approach to Stern's Sequence

Michael Coons, Jeffrey Shallit

摘要:

设w是一个二进制字符串,a_w(n)是词w在n的二进制展开式中出现的次数。通常我们用s(n)表示Stern序列;也就是说,s(0)=0,s(1)=1,对于n >= 1,s(2n)=s(n)和s(2n+1)=s(n)+s(n+1)。在本文中,我们证明了s(n)= a_1(n)+ \sum_{w in 1 (0+1)*} s([w bar])a_{w1}(n)其中w bar表示w的补码(通过发送0到1和1到0获得),[w]表示由以2为底解释的单词w指定的整数。

英文摘要:

Let w be a binary string and let a_w (n) be the number of occurrences of the word w in the binary expansion of n. As usual we let s(n) denote the Stern sequence; that is, s(0)=0, s(1)=1, and for n >= 1, s(2n)=s(n) and s(2n+1)=s(n)+s(n+1). In this note, we show that s(n) = a_1 (n) + \sum_{w in 1 (0+1)*} s([w bar]) a_{w1} (n) where w bar denotes the complement of w (obtained by sending 0 to 1 and 1 to 0, and [w] denotes the integer specified by the word w interpreted in base 2.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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