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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
6, 12, 10, 24, 14, 24, 18, 20, 22, 60, 26, 28, 30, 32, 34, 36, 38, 60, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..65.

Maurice Heins, On the number of 1-1 directly conformal maps which a multiply-connected plane region of finite connectivity p (>2) admits onto itself, Bull. Amer. Math. Soc. 52 (1946), 454-457.

PROG

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

CROSSREFS

Sequence in context: A315566 A236926 A134383 * A114797 A048726 A092461

Adjacent sequences:  A272302 A272303 A272304 * A272306 A272307 A272308

KEYWORD

nonn

AUTHOR

Michel Marcus, Apr 25 2016

STATUS

approved

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Last modified October 18 10:05 EDT 2019. Contains 328146 sequences. (Running on oeis4.)