A265748 - OEIS

A265748

First members of "good matches" produced by match-making permutation: a(n) = A266195(A266197(n)).

2, 4, 5, 9, 10, 18, 20, 21, 40, 42, 48, 96, 67, 84, 145, 134, 148, 193, 168, 290, 268, 336, 296, 386, 328, 592, 580, 536, 584, 645, 552, 771, 585, 772, 656, 1184, 1156, 1104, 1542, 1096, 1031, 1160, 1072, 1161, 2069, 1544, 1312, 2368, 1288, 1170, 1792, 1216, 1290, 2340, 2240, 2309, 3136, 4480, 2144, 2185, 3104, 2193, 2062, 2320, 2208, 2313, 2210

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OFFSET

1,1

COMMENTS

Note that a number occurs both here and in A265749 if and only if it is a good match both with its predecessor and the successor in A266195.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..10000 (first 154 terms from Antti Karttunen)

FORMULA

a(n) = A266195(A266197(n)).

Other identities. For all n >= 1:

A070939(a(n)) = A070939(A265749(n)). [By definition of "good match" in this context.]

PROG