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 A055618 a(n) = A*10^(4*n-1) + B with A = 990*(10^(4*n)-1)/9999 and B = 990000*(10^(4*n-4)-1)/9999 + 100. 2
 990100, 99009900990100, 9900990099009900990100, 990099009900990099009900990100, 99009900990099009900990099009900990100, 9900990099009900990099009900990099009900990100, 990099009900990099009900990099009900990099009900990100 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..7. EXAMPLE a(2) = (990*(10^8-1)/9999)*10^7 + 990000*(10^4-1)/9999 + 100 = 99009900990100 = 9900990^2 + 0990100^2. MAPLE for n from 1 to 15 do printf(`%d, `, (990*(10^(4*n)-1)/9999)*10^(4*n-1)+990000*(10^(4*n-4)-1)/9999+100 ) od: CROSSREFS Subset of A055616. Sequence in context: A154674 A236034 A055617 * A341551 A216276 A252903 Adjacent sequences: A055615 A055616 A055617 * A055619 A055620 A055621 KEYWORD nonn,base,easy AUTHOR Ulrich Schimke (ulrschimke(AT)aol.com) EXTENSIONS One more term from James A. Sellers, Sep 28 2001 a(6) corrected by Sean A. Irvine, Mar 29 2022 STATUS approved

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Last modified August 5 02:16 EDT 2024. Contains 374935 sequences. (Running on oeis4.)