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 A272305 Upper bound for the number of 1-1 directly conformal maps which a multiply-connected plane region of finite connectivity n >2 admits onto itself. 0

%I

%S 6,12,10,24,14,24,18,20,22,60,26,28,30,32,34,36,38,60,42,44,46,48,50,

%T 52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,

%U 98,100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130

%N Upper bound for the number of 1-1 directly conformal maps which a multiply-connected plane region of finite connectivity n >2 admits onto itself.

%H Maurice Heins, <a href="http://dx.doi.org/10.1090/S0002-9904-1946-08590-0">On the number of 1-1 directly conformal maps which a multiply-connected plane region of finite connectivity p (>2) admits onto itself</a>, Bull. Amer. Math. Soc. 52 (1946), 454-457.

%o (PARI) a(n) = if (n==4, 12, if ((n==6) || (n==8), 24, if ((n==12) || (n==20), 60, 2*n)));

%K nonn

%O 3,1

%A _Michel Marcus_, Apr 25 2016

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Last modified April 19 20:04 EDT 2019. Contains 322291 sequences. (Running on oeis4.)