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.

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

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: A236926 A134383 A366144 * A114797 A048726 A092461

Adjacent sequences: A272302 A272303 A272304 * A272306 A272307 A272308

Keyword

nonn

Author

Michel Marcus, Apr 25 2016

Status

approved