Another experiment in seq submission (A tribonacci analogue of A001056)

[Jonathan Post]

Okay, this is two in a row of experimental submissions that did return
autoreply email.  But there was the one earlier which did not.

NEW SEQUENCE FROM Jonathan Vos Post

%I A000001
%S A000001 1, 1, 1, 2, 3, 7, 43, 904, 272105, 10577265561
%N A000001 A tribonacci analogue of A001056.
%F A000001 a(0)=a(1)=a(2) = 1, a(n) = a(n-1)*a(n-2)*a(n-3) + 1.
%e A000001 a(8) = a(7)*a(6)*a(5) + 1 = 904 * 43 * 7 + 1 = 272105.
a(9) ~ 2.60182667 * 10^18.
a(10) ~ 7.48838719 * 10^33.
a(11) ~ 2.06082 * 10^62.
%Y A000001 Cf. A001056.
%O A000001 0,4
%K A000001 ,easy,more,nonn,
%A A000001 Jonathan Vos Post (jvospost2 at yahoo.com), Nov 24 2007
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