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 A348548 Positive integers that are the product of two integers ending with 8. 1
 64, 144, 224, 304, 324, 384, 464, 504, 544, 624, 684, 704, 784, 864, 944, 1024, 1044, 1064, 1104, 1184, 1224, 1264, 1344, 1404, 1424, 1444, 1504, 1584, 1624, 1664, 1744, 1764, 1824, 1904, 1944, 1984, 2064, 2124, 2144, 2184, 2204, 2224, 2304, 2384, 2464, 2484, 2544 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA Lim_{n->infinity} a(n)/a(n-1) = 1. EXAMPLE 64 = 8*8, 144 = 8*18, 224 = 8*28, 304 = 8*38, 324 = 18*18, 384 = 8*48, ... MATHEMATICA a={}; For[n=0, n<=260, n++, For[k=0, k<=n, k++, If[Mod[10*n+4, 10*k+8]==0 && Mod[(10*n+4)/(10*k+8), 10]==8 && 10*n+4>Max[a], AppendTo[a, 10*n+4]]]]; a PROG (Python) def aupto(lim): return sorted(set(a*b for a in range(8, lim//8+1, 10) for b in range(a, lim//a+1, 10))) print(aupto(2550)) # Michael S. Branicky, Oct 22 2021 CROSSREFS Cf. A017317 (supersequence), A053742 (ending with 5), A139245 (ending with 2), A324297 (ending with 6), A346950 (ending with 3), A347253 (ending with 4), A348054 (ending with 7), A348549. Sequence in context: A223063 A216330 A110232 * A188244 A044315 A044696 Adjacent sequences: A348545 A348546 A348547 * A348549 A348550 A348551 KEYWORD nonn,base AUTHOR Stefano Spezia, Oct 22 2021 STATUS approved

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Last modified January 28 14:40 EST 2023. Contains 359895 sequences. (Running on oeis4.)