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A075470 Primes arising from the rearrangement of the natural numbers such that sum of n (n>1) terms starting from the n-th term (included) is a prime (A073672). 1
2, 5, 13, 23, 37, 53, 71, 97, 131, 157, 191, 223, 263, 307, 347, 383, 431, 467, 521, 587, 653, 709, 787, 853, 937, 1009, 1087, 1153, 1237, 1327, 1423, 1511, 1613, 1709, 1823, 1931, 2053, 2161, 2269, 2377, 2503, 2617, 2749, 2879, 3011, 3137, 3299, 3449, 3613 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

MATHEMATICA

a = {2, 1, 4}; f[n_] := Block[{k = 1, b = Take[a, {n, 2n - 3}]}, While[ Position[a, k] != {}, k++ ]; b = Append[b, k]; a = Append[a, k]; While[ Position[a, k] != {} || !PrimeQ[Plus @@ b + k], k++ ]; a = Append[a, k]]; Do[ f[n], {n, 3, 50}]; Table[ Plus @@ Take[a, {n, 2n - 1}], {n, 1, 50}]

CROSSREFS

Cf. A073672.

Sequence in context: A298991 A046696 A102719 * A049779 A281906 A256491

Adjacent sequences:  A075467 A075468 A075469 * A075471 A075472 A075473

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Sep 18 2002

STATUS

approved

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Last modified July 5 23:36 EDT 2020. Contains 335475 sequences. (Running on oeis4.)