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Fixed points of permutations A275837 & A275838.
3

%I #9 Aug 13 2016 11:09:37

%S 0,1,2,5,6,14,24,54,120,145,264,411,464,720,842,1560,2042,2408,2670,

%T 5040,5766,10800,13686,16590,18144,40320,45384,85680,105864,106153,

%U 131184,141960,145728

%N Fixed points of permutations A275837 & A275838.

%C Numbers n for which A225901(n) = A273667(n).

%C If n is a member, then A153880(n) is also a member, thus sequence is infinite and all factorial numbers (A000142) are present.

%H <a href="/index/Fa#facbase">Index entries for sequences related to factorial base representation</a>

%o (Scheme, with _Antti Karttunen_'s IntSeq-library, two implementations)

%o (define A275839 (FIXED-POINTS 0 0 A275837))

%o (define A275839 (MATCHING-POS 0 0 (lambda (n) (= (A225901 n) (A273667 n)))))

%Y Cf. A000142 (a subsequence).

%Y Cf. A153880, A225901, A273667, A275837, A275838.

%K nonn,base

%O 0,3

%A _Antti Karttunen_, Aug 13 2016