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A056451 Number of palindromes using a maximum of five different symbols. +0
6
5, 5, 25, 25, 125, 125, 625, 625, 3125, 3125, 15625, 15625, 78125, 78125, 390625, 390625, 1953125, 1953125, 9765625, 9765625, 48828125, 48828125, 244140625, 244140625, 1220703125, 1220703125, 6103515625 (list; graph; listen)
OFFSET

1,1

REFERENCES

M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.

FORMULA

5^[(n+1)/2].

CROSSREFS

Cf. A016116.

Sequence in context: A145764 A165826 A071340 this_sequence A074872 A162962 A154630

Adjacent sequences: A056448 A056449 A056450 this_sequence A056452 A056453 A056454

KEYWORD

nonn

AUTHOR

Marks R. Nester (nesterm(AT)dpi.qld.gov.au)

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Last modified December 16 13:01 EST 2009. Contains 170825 sequences.


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