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 A158964 Numbers n such that A160691(n) = A160691(n+1) = A160691(n+2) = 8. 2
 107486, 126785, 160804, 162574, 200559, 222165, 265520, 290313, 315707, 318773, 374503, 375852, 381663, 411843, 414979, 420016, 440389, 451070, 451637, 456681, 469794, 488232, 500727, 503603, 510728, 521342, 522953, 525526, 526171, 536413, 541116, 552763, 553368, 555582 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The first triples with value 2, 4, 6, 8 are for n=2, 18, 344349, 107486. - Michel Marcus, Sep 07 2017 LINKS Table of n, a(n) for n=1..34. MATHEMATICA d[n_]:=DivisorSigma[0, m]; c[1]=1; c[n_]:=c[n]=(s=Sum[c[k], {k, n-1}]; For[m=1, d[m] != d[s+m], m++ ]; m); Do[If[d[c[n]]==d[c[n+1]]==d[c[n+2]]==8, Print[n]], {n, 223000}] CROSSREFS Cf. A158963, A160689, A160690, A160691. Sequence in context: A061332 A237866 A204875 * A248446 A202404 A203882 Adjacent sequences: A158961 A158962 A158963 * A158965 A158966 A158967 KEYWORD nonn AUTHOR Farideh Firoozbakht, May 29 2009 EXTENSIONS More terms from Michel Marcus, Sep 05 2017 STATUS approved

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Last modified September 29 16:13 EDT 2023. Contains 365773 sequences. (Running on oeis4.)