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 A325311 Odd abundant numbers n for which sigma(n) == 3 (mod 4). 7
 11025, 99225, 245025, 540225, 893025, 1334025, 2205225, 3980025, 4862025, 5832225, 6890625, 8037225, 8555625, 9828225, 10595025, 10989225, 12006225, 14402025, 19847025, 20385225, 24354225, 26163225, 26471025, 29648025, 31979025, 35820225, 38378025, 43758225, 46580625, 49491225, 50339025, 52490025, 55577025, 57836025, 60140025 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS These are all squares. Square roots are in A325312. LINKS Antti Karttunen, Table of n, a(n) for n = 1..10000 PROG (PARI) isA325311(n) = (n%2 && (3==sigma(n)%4) && sigma(n)>(2*n)); CROSSREFS Cf. A000203, A324647, A325312 (square roots). Intersection of A005231 and A324899. Subsequence of A156942. Sequence in context: A129087 A239828 A156942 * A164518 A198208 A139409 Adjacent sequences:  A325308 A325309 A325310 * A325312 A325313 A325314 KEYWORD nonn AUTHOR Antti Karttunen, Apr 20 2019 STATUS approved

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Last modified May 15 02:21 EDT 2021. Contains 343909 sequences. (Running on oeis4.)