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A123058
Number of different quartets of 4 differents bemirps of n digits.
0
0, 0, 0, 0, 1, 1, 1, 2, 9, 29, 60, 221, 749, 2560, 9432, 35685
OFFSET
0,8
EXAMPLE
1061 1091 1901 1601 are a quartet of 4 different bemirps and there is no other different quartet of 4 digits, so a(4)=1
CROSSREFS
Sequence in context: A338436 A041877 A090208 * A212272 A062452 A265440
KEYWORD
base,nonn
AUTHOR
Pierre CAMI, Sep 26 2006
STATUS
approved