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 A354442 The primes sums formed for each completed 3 X 3 square of numbers in A354441. 4
 47, 61, 79, 71, 103, 89, 127, 107, 127, 167, 127, 139, 193, 167, 173, 191, 239, 193, 197, 223, 307, 257, 257, 251, 263, 331, 281, 271, 277, 307, 379, 337, 347, 359, 349, 353, 431, 379, 379, 397, 409, 439, 499, 449, 439, 463, 457, 461, 479, 569, 499, 491, 509, 521, 523, 557, 643, 557, 563, 599, 613 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS See A354441 for further details. In the first one million terms the most frequently occurring prime sum is 8986531, which occurs twenty-eight times. It is unknown if the maximum number of times a prime sum can occur is finite or unbounded. LINKS Table of n, a(n) for n=1..61. Scott R. Shannon, Image of the first 1000 terms. The green line is y = n. EXAMPLE The first prime sum is 47, which is the sum of the innermost nine values 1,2,3,4,5,6,7,8,11 which form the 3 X 3 square centered at (0,0) in the square spiral shown in A354441. The second prime sum is 61, which is the sum of the nine values 1,2,3,4,8,9,10,11,13 which form the 3 X 3 square centered at (1,0) in the square spiral shown in A354441. CROSSREFS Cf. A354441, A337116, A257339, A354434, A000040. Sequence in context: A243430 A342093 A126980 * A354461 A039355 A043178 Adjacent sequences: A354439 A354440 A354441 * A354443 A354444 A354445 KEYWORD nonn AUTHOR Scott R. Shannon, May 29 2022 STATUS approved

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Last modified September 30 19:35 EDT 2023. Contains 365793 sequences. (Running on oeis4.)