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a(n) is smallest prime > 11*a(n-1), a(1) = 11.
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%I #2 Mar 30 2012 17:30:37

%S 11,127,1399,15391,169307,1862381,20486203,225348257,2478830833,

%T 27267139177,299938530953,3299323840567,36292562246243,

%U 399218184708683,4391400031795559,48305400349751191,531359403847263197

%N a(n) is smallest prime > 11*a(n-1), a(1) = 11.

%t NextPrim[n_Integer] := Block[ {k = n + 1}, While[ !PrimeQ[k], k++ ]; Return[k]]; a[1] = 11; a[n_] := NextPrim[ 11*a[n - 1]]; Table[ a[n], {n, 1, 20} ]

%K nonn

%O 1,1

%A _Robert G. Wilson v_, Nov 28 2001