%I A002502 M5336 N2323
%S A002502 1,65,1795,36317,636331,10365005,162470155,2495037197,37898120011,
%T A002502 572284920845,8614868501515,129467758660877,1943971108806091,
%U A002502 29175170378428685,437752102106036875,6567275797761209357
%N A002502 Number of connected relations.
%D A002502 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A002502 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A002502 G. Kreweras, Inversion des polynomes de Bell bidimensionnels et application 
               au denombrement des relations binaires connexes. C. R. Acad. Sci. 
               Paris Ser. A-B 268 1969 A577-A579.
%H A002502 T. D. Noe, <a href="b002502.txt">Table of n, a(n) for n=1..100</a>
%F A002502 15^n-4*8^n-3*6^n+12*5^n-6*4^n. - Goran Kilibarda, Vladeta Jovovic (vladeta(AT)eunet.rs), 
               Apr 14 2004
%Y A002502 Cf. A005333, A001047, A002501, A093732, A093733.
%Y A002502 Sequence in context: A086021 A069424 A086029 this_sequence A095027 A017781 
               A017728
%Y A002502 Adjacent sequences: A002499 A002500 A002501 this_sequence A002503 A002504 
               A002505
%K A002502 nonn,nice,easy
%O A002502 1,2
%A A002502 N. J. A. Sloane (njas(AT)research.att.com).
%E A002502 More terms from Goran Kilibarda, Vladeta Jovovic (vladeta(AT)eunet.rs), 
               Apr 14 2004