0,5
a(4) =4*(3^3)*(2^3)*1 =4*27*8*1 =864
Cf. A000027, A002378, A047928, A064319, A064320.
Sequence in context: A115749 A105323 A097982 this_sequence A082243 A114497 A129035
Adjacent sequences: A064318 A064319 A064320 this_sequence A064322 A064323 A064324
nonn
Henry Bottomley (se16(AT)btinternet.com), Sep 10 2001
Search completed in 0.002 seconds