0,2
(4^n - 1)(4^n - 4)...(4^n - 4^(n-1))
Cf. A002884, A053290, A053292, A053293.
Cf. A003788.
Sequence in context: A091324 A198446 A093434 * A013519 A042779 A103503
Adjacent sequences: A053288 A053289 A053290 * A053292 A053293 A053294
easy,nonn
Stephen G. Penrice (spenrice(AT)ets.org), Mar 04 2000
More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Mar 16 2000