%I A026243
%S A026243 0,3,14,63,324,1955,13698,109599,986408,9864099,108505110,1302061343,16926797484,
%T A026243 236975164803,3554627472074,56874039553215,966858672404688,17403456103284419,
%U A026243 330665665962403998,6613313319248079999,138879579704209680020,3055350753492612960483
%N A026243 A000522(n) - 2.
%C A026243 Number of operations of addition and multiplication needed to evaluate 
               a determinant of order n by cofactor expansion.
%D A026243 C. Dubbs and D. Siegel, Computing determinants, College Math. J., 18 
               (1987), 48-49.
%D A026243 A. R. Pargeter, The vanishing coffee morning, Math. Gaz., 76 (1992), 
               386-387.
%D A026243 P. G. Sawtelle, The ubiquitous e, Math. Mag., 49 (1976), 244-245. [From 
               N. J. A. Sloane (njas(AT)research.att.com), Jan 29 2009]
%Y A026243 Cf. A000522, A007526. Equals A033312 + A038156.
%Y A026243 Cf. A001339.
%Y A026243 Sequence in context: A091701 A151237 A151238 this_sequence A058139 A101476 
               A060801
%Y A026243 Adjacent sequences: A026240 A026241 A026242 this_sequence A026244 A026245 
               A026246
%K A026243 nonn
%O A026243 1,2
%A A026243 N. J. A. Sloane (njas(AT)research.att.com), based on a message from a 
               correspondent who wishes to remain anonymous, Dec 21 2003