A046285 Numbers k such that the sum of the first k primes is a lucky number.

10, 20, 34, 36, 46, 52, 56, 68, 72, 86, 88, 90, 96, 100, 102, 118, 130, 140, 144, 154, 166, 198, 228, 240, 242, 282, 318, 328, 348, 356, 360, 366, 392, 402, 418, 440, 452, 464, 472, 476, 510, 540, 556, 570, 572, 586, 592, 600, 604, 614, 638, 650, 654, 670, 684

Offset: 1

Author

Patrick De Geest, Jun 15 1998

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..730

Crossrefs

Cf. A000959, A007504, A046280.

Programs

Mathematica

lst = Range[1, 1700000, 2]; i = 2; While[ i <= (len = Length@lst) && (k = lst[[i]]) <= len, lst = Drop[lst, {k, len, k}]; i++ ]; lst2 = {}; s = 0; Do[s = s + Prime@n; If[MemberQ[lst, s], Print[n]; AppendTo[lst2, n]], {n, 687}]; lst2 (* Robert G. Wilson v *)

Extensions

More terms from Robert G. Wilson v, May 12 2006