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Search: id:A147800
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| 2, 6, 22, 42, 222, 366, 2046, 13962, 10626, 79926, 293262
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OFFSET
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1,1
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COMMENT
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The minima are reached for m values given in A147803.
This is related to the abc conjecture, see also A143702, A147801 (2^n, 3^n analogues) and A147298 (general case).
All terms of this sequence are even, so one could also consider A147800/2 = 1, 3, 11, 21, 111, 183, 1023, 6981, 5313, 39963, 146631,...
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PROGRAM
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(PARI) A147800(n, p=5)={local(m=n=p^n); for(a=1, (n-1)\2, a%p|next; A007947(n-a)*A007947(a)<m|next; m=A007947((n-a)*a)); m}
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CROSSREFS
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Cf. A007947, A147803 (m values), A143702 (analogue for 2^n), A147801 (analogue for 3^n), A147298 (general case).
Sequence in context: A129534 A085286 A062085 this_sequence A027561 A126171 A002839
Adjacent sequences: A147797 A147798 A147799 this_sequence A147801 A147802 A147803
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KEYWORD
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more,nonn
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AUTHOR
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M. F. Hasler (MHasler(AT)univ-ag.fr), Nov 13 2008
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