A341631 Numbers k such that A073837(k) is prime.
2, 7, 9, 14, 19, 27, 28, 29, 30, 36, 44, 60, 61, 68, 70, 71, 87, 88, 89, 100, 101, 104, 105, 108, 109, 112, 113, 138, 157, 174, 192, 193, 199, 201, 202, 203, 204, 210, 274, 275, 276, 277, 304, 305, 306, 364, 365, 366, 372, 373, 384, 387, 388, 389, 399, 400, 401, 405, 471, 472, 473, 511, 512, 513
Offset: 1
Keywords
Examples
a(3) = 9 is in the sequence because A073837(9) = 11+13+17 = 41 is prime.
Links
- Robert Israel, Table of n, a(n) for n = 1..10000
Programs
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Maple
R:= 2: S:= [2, 3]: s:= 5: q:= 5: count:= 1: for n from 3 while count < 100 do if n = S[1]+1 then S:= S[2..-1]; s:= s-n+1 fi; if q <= 2*n then S:= [op(S), q]; s:= s+q; q:= nextprime(q) fi; if isprime(s) then count:= count+1; R:= R, n; fi; od: R;
Comments