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A152161 100n^2 + 100n + 21. 2
21, 221, 621, 1221, 2021, 3021, 4221, 5621, 7221, 9021, 11021, 13221, 15621, 18221, 21021, 24021, 27221, 30621, 34221, 38021, 42021, 46221, 50621, 55221, 60021, 65021, 70221, 75621, 81221, 87021, 93021, 99221, 105621, 112221, 119021 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

FORMULA

a(n) = A017305(n)*A017353(n) = A061037(10*n+3).

PROG

(MAGMA) [(10*n+3)*(10*n+7): n in [0..40]]; // Vincenzo Librandi, Jul 28 2011

(PARI) a(n)=100*n*(n+1)+21 \\ Charles R Greathouse IV, Jul 28 2011

CROSSREFS

Sequence in context: A060933 A075282 A165223 * A008421 A134585 A165402

Adjacent sequences:  A152158 A152159 A152160 * A152162 A152163 A152164

KEYWORD

nonn,easy

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Nov 27 2008

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Last modified February 15 21:56 EST 2012. Contains 205860 sequences.