A213814 Primes that are sums of three, five and seven consecutive primes.
311, 61643, 67141, 87853, 115361, 142799, 210031, 332489, 362309, 723823, 1149749, 1352863, 1444957, 1638733, 2197759, 2204117, 2299313, 2457473, 2765387, 3069263, 3212593, 3588647, 3633983
Offset: 1
Keywords
Examples
311 = 101 + 103 + 107 = 53 + 59 + 61 + 67 + 71 = 31 + 37 + 41 + 43 + 47 + 53 + 59.
Links
- Vincenzo Librandi, Table of n, a(n) for n = 1..530
Crossrefs
Subsequence of A211170.
Programs
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Mathematica
pr = Prime[Range[100000]]; to3 = Total /@ Partition[pr, 3, 1]; to5 = Total /@ Partition[pr, 5, 1]; to7 = Total /@ Partition[pr, 7, 1]; Select[Intersection[to3, to5, to7], PrimeQ]
Comments