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A286271 a(0)=1; thereafter a(n) = Sum_{k=2..n} A006206(k). 1
1, 1, 2, 3, 5, 7, 11, 16, 24, 35, 53, 78, 118, 176, 266, 401, 611, 927, 1419, 2169, 3333, 5124, 7910, 12215, 18925, 29345, 45609, 70959, 110609, 172576, 269684, 421829, 660647, 1035602, 1625122, 2552322, 4012282, 6312136, 9938336, 15658610, 24689060, 38952138 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..42.

Marston Conder, S. Du, R. Nedela, M. Skoviera, Regular maps with nilpotent automorphism group, Journal of Algebraic Combinatorics, December 2016, Volume 44, Issue 4, pp 863-874; DOI: 10.1007/s10801-016-0692-8

CROSSREFS

Cf. A006206, A286272.

Sequence in context: A023435 A274184 A091501 * A083198 A112088 A117792

Adjacent sequences:  A286268 A286269 A286270 * A286272 A286273 A286274

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 08 2017

STATUS

approved

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Last modified August 20 23:06 EDT 2018. Contains 313929 sequences. (Running on oeis4.)