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Number of unsensed 4-regular maps with 2*n edges on the projective plane.
3

%I #4 Oct 31 2021 17:12:26

%S 2,6,29,153,1015,7572,62316,548575,5069705,48490576,475784885,

%T 4760060954,48363620851,497636022164

%N Number of unsensed 4-regular maps with 2*n edges on the projective plane.

%D Krasko, Evgeniy, and Alexander Omelchenko. "Enumeration of unsensed r-regular maps on the projective plane and the Klein bottle." Discrete Mathematics 344.11 (2021): #112528.

%Y Cf. A348765-A348767.

%K nonn,more

%O 1,1

%A _N. J. A. Sloane_, Oct 31 2021