A056460 - OEIS

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A056460

Number of primitive (aperiodic) palindromes using a maximum of four different symbols.

4, 0, 12, 12, 60, 48, 252, 240, 1008, 960, 4092, 4020, 16380, 16128, 65460, 65280, 262140, 261072, 1048572, 1047540, 4194036, 4190208, 16777212, 16772880, 67108800, 67092480, 268434432, 268419060 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`Sum mu(d)*A056450(n/d) where d\|n.`
	CROSSREFS	`Sequence in context: A076600 A002978 A170878 * A137523 A117786 A117788` `Adjacent sequences: A056457 A056458 A056459 * A056461 A056462 A056463`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.