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A064544
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Biquanimous numbers (or biquams): group the digits into two pieces (not necessarily equal or in order) with the same sum.
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9
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0, 11, 22, 33, 44, 55, 66, 77, 88, 99, 101, 110, 112, 121, 123, 132, 134, 143, 145, 154, 156, 165, 167, 176, 178, 187, 189, 198, 202, 211, 213, 220, 224, 231, 235, 242, 246, 253, 257, 264, 268, 275, 279, 286, 297, 303, 312, 314, 321, 325, 330, 336, 341, 347, 352, 358
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graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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COMMENTS
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This sequence is 10-automatic (decimal expansions form a regular language accepted by a finite automaton).
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LINKS
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EXAMPLE
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143 is in the sequence because its digits {1, 4, 3} may be grouped so that 1+3 = 4.
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PROG
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(PARI) is(n) = { my (d=digits(n), s=[0]); for (k=1, #d, s=setunion(apply(v -> v+d[k], s), apply(v -> v-d[k], s))); setsearch(s, 0)>0 } \\ Rémy Sigrist, Jan 23 2021
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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STATUS
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approved
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