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 A334011 a(n) is the least integer that can be expressed as the sum of one or more consecutive nonzero heptagonal numbers in exactly n ways. 6
 1, 872, 8240232, 263346158075 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Eric Weisstein's World of Mathematics, Heptagonal Number EXAMPLE Let S(k, m) denote the sum of m heptagonal numbers starting from the k-th. We have a(1) = S(1, 1); a(2) = S(13, 2) = S(3, 8); a(3) = S(133, 98) = S(479, 14) = S(168, 77); a(4) = S(6773, 1785) = S(810, 6006) = S(7467, 1547) = S(38758, 70). CROSSREFS Cf. A000566, A054859, A068314, A186337, A298467, A322636, A334007, A334008, A334010, A334012. Sequence in context: A214285 A251841 A251085 * A206312 A252211 A045258 Adjacent sequences:  A334008 A334009 A334010 * A334012 A334013 A334014 KEYWORD nonn,hard,more AUTHOR Ilya Gutkovskiy, Apr 12 2020 EXTENSIONS a(4) from Giovanni Resta, Apr 14 2020 STATUS approved

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Last modified October 23 04:06 EDT 2021. Contains 348211 sequences. (Running on oeis4.)