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 A287748 If A070281(n) not is 0, then a(n) is index of the starting primes for form A070281(n), or a(n) = 0 if A070281(n) = 0. 0
 1, 2, 3, 2, 3, 2, 7, 0, 2, 0, 3, 2, 10, 2, 2, 0, 2, 0, 5, 0, 4, 0, 4, 0, 3, 0, 4, 0, 6, 0, 6, 0, 4, 0, 3, 0, 3, 0, 6, 0, 4, 0, 4, 0, 4, 0, 4, 0, 5, 0, 7, 0, 2, 0, 2, 0, 25, 0, 10, 2, 2, 0, 6, 2, 2, 0, 8, 0, 8, 0, 2, 0, 3, 0, 2, 0, 9, 0, 4, 0, 5, 0, 16, 0, 11 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE A070281(13) = 691 = prime(10) + ... + prime(22), thus a(13) = 10. CROSSREFS Cf. A070281, A013916. Sequence in context: A255354 A344349 A318620 * A260233 A108656 A164962 Adjacent sequences:  A287745 A287746 A287747 * A287749 A287750 A287751 KEYWORD nonn AUTHOR XU Pingya, May 31 2017 STATUS approved

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Last modified June 24 17:51 EDT 2021. Contains 345419 sequences. (Running on oeis4.)