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%I #11 Apr 06 2024 09:02:18
%S 3,-4,64,-253,4292,-25608,442008,-3202512,56565002,-457852636,
%T 8250107250,-71585012513,1313205529004,-11929616869396,
%U 222527122219040,-2085032711731864,39524158910209535,-378082239815999340
%N a(n) = A278034(n)/4.
%H V. Braun, P. Candelas, X. de la Ossa, <a href="https://arxiv.org/abs/1512.08367">Two One-Parameter Special Geometries</a>, arXiv preprint arXiv:1512.08367 [hep-th], 2015.
%H D. Broadhurst, <a href="https://carmamaths.org/resources/jon/Preprints/Papers/Submitted%20Papers/4step-walks/walk-broadhurst.pdf">Bessel moments, random walks and Calabi-Yau equations</a>, July, 2009.
%Y Cf. A278034.
%K sign
%O 1,1
%A _N. J. A. Sloane_, Nov 14 2016