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 A116333 k times k+8 gives the concatenation of two numbers m and m+6. 6
 23, 70, 480, 513, 942, 76303, 8923139715521228493004072379869, 77558981961505761619171327422086381910161500424346805, 4494071669430455134012149964165405936125116123191254722256003057119, 5505928330569544865987850035834594063874883876808745277743996942874 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Chai Wah Wu, Table of n, a(n) for n = 1..16 EXAMPLE 76303 * 76311 = 58227//58233, where // denotes concatenation, so 76303 is a term. PROG (Python) from itertools import count, islice from sympy import sqrt_mod def A116333_gen(): # generator of terms for j in count(0): b = 10**j a = b*10+1 for k in sorted(sqrt_mod(22, a, all_roots=True)): if a*(b-6) <= k**2-22 < a*(a-7) and k>4: yield k-4 A116333_list = list(islice(A116333_gen(), 10)) # Chai Wah Wu, Feb 21 2024 CROSSREFS Cf. A116202, A116327, A116332, A116334, A116341. Sequence in context: A042036 A042034 A042038 * A042040 A073035 A086104 Adjacent sequences: A116330 A116331 A116332 * A116334 A116335 A116336 KEYWORD nonn,base AUTHOR Giovanni Resta, Feb 06 2006 EXTENSIONS a(8)-a(10) from Chai Wah Wu, Feb 21 2024 STATUS approved

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Last modified June 13 22:21 EDT 2024. Contains 373391 sequences. (Running on oeis4.)