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A069912 a(n) = A067552(n)/9 where A067552(n) = SumOfDigits(n)^2 - SumOfDigits(n^2), with SumOfDigits = A007953. 2
0, 0, 0, 0, 1, 2, 3, 4, 6, 8, 0, 0, 0, 0, 1, 3, 4, 5, 8, 10, 0, 0, 0, 1, 2, 4, 5, 7, 9, 12, 0, 0, 2, 2, 4, 6, 7, 9, 12, 15, 1, 1, 2, 3, 5, 8, 10, 12, 15, 18, 2, 3, 4, 5, 7, 10, 12, 14, 17, 20, 3, 4, 5, 6, 9, 12, 14, 16, 20, 23, 4, 6, 7, 9, 11, 14, 16, 19, 23, 27, 6, 7, 9, 10, 14, 17, 19, 22, 26, 30 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Ivan Neretin, Table of n, a(n) for n = 0..10000

PROG

(PARI) a(n) = (sumdigits(n)^2 - sumdigits(n^2))/9; \\ Michel Marcus, Sep 01 2016

CROSSREFS

Sequence in context: A270475 A171249 A036413 * A152306 A120817 A327887

Adjacent sequences:  A069909 A069910 A069911 * A069913 A069914 A069915

KEYWORD

nonn,base

AUTHOR

Vladeta Jovovic, May 04 2002

EXTENSIONS

Offset changed to 0 for compatibility with A067552 by Ivan Neretin, Sep 01 2016

STATUS

approved

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Last modified January 17 19:55 EST 2022. Contains 350406 sequences. (Running on oeis4.)