A002935 - OEIS

%I M1364 N0528 #21 Mar 03 2023 16:25:39

%S 1,1,2,5,9,22,62,177,560,1939,7067,27331,110871,468684,2057161,9341736

%N Number of series-reduced star graphs with n edges.

%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H B. R. Heap, <a href="https://doi.org/10.1063/1.1705068">The enumeration of homeomorphically irreducible star graphs</a>, J. Math. Phys., 7 (1966), 1582-1587.

%Y Row sums of A046752.

%Y Cf. A360879.

%K nonn,nice,more

%O 3,3

%A _N. J. A. Sloane_

%E a(13)-a(17) from _Sean A. Irvine_, May 18 2020

%E a(18) from _Andrew Howroyd_, Feb 25 2023