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 A079782 Final term of n-th row of triangle in A079784. 4
 2, 5, 11, 11, 59, 59, 419, 839, 2519, 2519, 27719, 27719, 360359, 360359, 360359, 720719, 12252239, 12252239, 232792559, 232792559, 232792559, 232792559, 5354228879, 5354228879, 26771144399, 26771144399, 80313433199, 80313433199, 2329089562799, 2329089562799 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS For n >= 4, a(n) = A003418(n) - 1. Also for n < 4, a(n) is the smallest number congruent to (i-1) (mod i) for any i in {1..n}. That results directly from the definition of A003418 (if p == 0 (mod q), p-1 == (q-1) (mod q)) and from the first comment. - Philippe LALLOUET (philip.lallouet(AT)wanadoo.fr), Aug 29 2007 LINKS EXAMPLE a(4) = lcm(1, 2, 3, 4) - 1 = 12 - 1 = 11. a(5) = lcm(1, 2, 3, 4, 5) - 1 = 60 - 1 = 59. - Michael Somos, Feb 28 2014 MAPLE A079782 := proc(n) local a, found, r ; a := n+1 ; while true do found := true ; for r from 1 to n do if (a+r-1) mod (n-r+1) <> 0 then found := false ; break ; fi ; od ; if found then RETURN(a+n-1) ; fi ; a :=a+1 ; od ; end: for n from 1 to 20 do print(A079782(n)) ; od ; # R. J. Mathar, Nov 12 2006 PROG (PARI) okrow(m, n) = {v = vector(n, i, i+m-1); for (i=1, n, if (v[i] % (n-i+1), return (0)); ); return (1); } a(n) = {m = n+1; while (! okrow(m, n), m++); m+n-1; } \\ Michel Marcus, Feb 28 2014 CROSSREFS Cf. A079781, A079783, A079784. Sequence in context: A062251 A091114 A155767 * A093554 A168453 A136990 Adjacent sequences:  A079779 A079780 A079781 * A079783 A079784 A079785 KEYWORD nonn AUTHOR Amarnath Murthy, Feb 03 2003 EXTENSIONS More terms from R. J. Mathar, Nov 12 2006 More terms from Michel Marcus, Feb 28 2014 STATUS approved

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Last modified September 28 12:34 EDT 2020. Contains 337393 sequences. (Running on oeis4.)