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 A218212 Number of primes up to 10^n that are the sum of six consecutive squares of nonnegative numbers. 4
 0, 0, 4, 14, 29, 78, 225, 632, 1716, 4726, 13482, 38627, 112051, 327426, 959254, 2829346, 8391477, 24975616, 74606489, 223523560, 671611810 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS These are primes of the form 91 + 42*k + 6*k^2. LINKS FORMULA a(n) = Sum_{k=1..n} A218211(k). MATHEMATICA n = 0; cnt = 0; Table[While[n++; p = 91 + 42*n + 6*n^2; p < 10^e, If[PrimeQ[p], cnt++]]; n--; cnt, {e, 14}] (* T. D. Noe, Oct 23 2012, edited by Michael De Vlieger, Feb 18 2018 *) CROSSREFS Cf. A027866, A027867, A218208, A218210, A218211. Sequence in context: A296985 A338311 A244714 * A305637 A103779 A049451 Adjacent sequences: A218209 A218210 A218211 * A218213 A218214 A218215 KEYWORD nonn,base,more AUTHOR Martin Renner, Oct 23 2012 EXTENSIONS a(13)-a(21) from Chai Wah Wu, Feb 12 2018 Changed terms (as A218211(2) is reverted back to 0) by Chai Wah Wu, Feb 13 2018 STATUS approved

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Last modified March 21 07:38 EDT 2023. Contains 361393 sequences. (Running on oeis4.)