[0,0,2,12,58,4,100,664,3514,16916,77388,343144, 1490148,6376616,26992264,113317936,472661434, 1961361076,8104733884,33374212936,137031378124, 11497939448,94924291832,562662294608, 2936768405732,14326881917576,67031420473208, 304860388037136]