排列组合相关问题

=--REDUCE("",SEQUENCE(B1),LAMBDA(s,n,TOCOL(s&SEQUENCE(,A1))))
=LET(p,SEQUENCE(,A1),--REDUCE("",SEQUENCE(B1),LAMBDA(s,n,TOCOL(IF(ISERR(FIND(p,s)),s&p,坤),3))))
=LET(p,SEQUENCE(,A1),--REDUCE(0,SEQUENCE(B1),LAMBDA(s,n,TOCOL(IF(p<--RIGHT(s),坤,s&p),3))))
=LET(p,REDUCE("",SEQUENCE(A1),LAMBDA(s,n,VSTACK(s,s&n))),--FILTER(p,LEN(p)=B1))

=LET(s,REPT(1,B1),a,SEQUENCE(s*A1-s+1,,s),b,SEQUENCE(,9),f,LAMBDA(z,TOCOL(a/(1-REGEXTEST(a,z)),2)),IFNA(HSTACK(f(0),f("0|(\d).*\1"),UNIQUE(BYROW(MID(f(0),b,1),LAMBDA(w,CONCAT(SORT(w,,,1))))),TOCOL(BYROW(IF(-MID(BASE(SEQUENCE(2^A1-1),2,A1),b,1),A1+1-b,""),LAMBDA(y,IF(COUNT(y)=B1,CONCAT(SORT(y,,,1)),\))),2)),""))

=LET(s,REPT(1,B1),a,SEQUENCE(s*A1-s+1,,s),b,SEQUENCE(,A1),f,LAMBDA(z,TOCOL(a/(1-REGEXTEST(a,z)),2)),g,LAMBDA(h,BYROW(h,LAMBDA(y,IF(COUNT(y)=B1,CONCAT(SORT(y,,,1)),\)))),IFNA(HSTACK(f(0),f("0|(\d).*\1"),g(--MID(f(0),SEQUENCE(,B1),1)),TOCOL(g(IF(-MID(BASE(SEQUENCE(2^A1-1),2,A1),b,1),A1+1-b,"")),2)),""))