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%I #7 Oct 17 2020 05:46:37
%S 1,2,6,8,40,72,160,288,256,512,2560,2048,6144,30720,24576,122880,
%T 147456,737280,1638400,1179648,3932160,4718592,21233664,12582912,
%U 25165824,382205952,67108864,679477248,1509949440,805306368,13589544960,4831838208,9663676416,32212254720
%N 30*a(n) + 1 is the least prime of the form 2^r*3^s*5^t + 1, r > 0, s > 0, t > 0, r + s + t = n.
%H Hugo Pfoertner, <a href="/A337882/b337882.txt">Table of n, a(n) for n = 3..1000</a>
%Y Cf. A051037, A071520, A336773, A337881.
%K nonn
%O 3,2
%A _Hugo Pfoertner_ and _Rainer Rosenthal_, Oct 12 2020