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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, 990099009900990099009900990099009900990, 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

STATUS

approved

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Last modified October 21 23:34 EDT 2021. Contains 348160 sequences. (Running on oeis4.)