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 A116339 k times k+6 gives the concatenation of two numbers m and m+7. 6
 378, 617, 708, 903, 8761, 45456, 54539, 693063, 8181812, 88235288, 327935224, 330669332, 363636365, 418318517, 428571430, 461538455, 538461540, 571428565, 581681478, 636363630, 669330663, 672064771, 691571588 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Robert Israel, Table of n, a(n) for n = 1..8987 MAPLE f:= proc(d) local S, x; S:= map(rhs@op, [msolve((x+3)^2 = 16, 10^d+1)]); end proc: g:= proc(n, d) local m; m:= ((n+3)^2-16)/(10^d+1)+7; m >= 10^(d-1) and m < 10^d end proc: sort([seq](op(select(g, f(i), i)), i=2..13)); # Robert Israel, Jan 27 2024 CROSSREFS Cf. A116208, A116325, A116338, A116340, A116345. Sequence in context: A268373 A030029 A064242 * A225440 A098840 A065702 Adjacent sequences: A116336 A116337 A116338 * A116340 A116341 A116342 KEYWORD nonn,base AUTHOR Giovanni Resta, Feb 06 2006 STATUS approved

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Last modified May 20 02:39 EDT 2024. Contains 372703 sequences. (Running on oeis4.)