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A291074
Take n-th string over {1,2} in lexicographic order and apply the Watanabe tag system {00, 0111} described in A291069 (but adapted to the alphabet {1,2}) just once.
4
-1, 22, 1, 1, 222, 222, 11, 11, 11, 11, 1222, 1222, 1222, 1222, 111, 211, 111, 211, 111, 211, 111, 211, 11222, 21222, 11222, 21222, 11222, 21222, 11222, 21222, 1111, 1211, 2111, 2211, 1111, 1211, 2111, 2211, 1111, 1211, 2111, 2211, 1111, 1211, 2111
OFFSET
1,2
MAPLE
See A291072.
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Aug 18 2017
STATUS
approved