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A322421
Primes of the form A322420(k) or the sum of the first k*(k+1) primes.
3
5, 41, 197, 44683, 360979, 3619807, 5353841, 25106701, 47525059, 159781073, 188024357, 243458497, 445838927, 1015334371, 2018174117, 2079737563, 4925466041, 5294877781, 6383922529, 6531129499, 6680974507, 7635495793
OFFSET
1,1
LINKS
FORMULA
MATHEMATICA
f[n_] := Sum[Prime[k], {k, n}]; Select[
Table[f[n*(n + 1)], {n, 0, 240}], PrimeQ]
CROSSREFS
KEYWORD
nonn
AUTHOR
Ray Chandler, Dec 07 2018
STATUS
approved