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A139417 Sum of digits of the square of the sum of the preceding numbers. 0
1, 1, 4, 9, 9, 18, 18, 9, 18, 27, 27, 27, 18, 27, 18, 27, 18, 9, 27, 27, 27, 27, 18, 27, 9, 27, 27, 27, 9, 27, 27, 36, 27, 27, 27, 18, 27, 27, 27, 27, 27, 36, 36, 9, 27, 27, 18, 36, 36, 27, 18, 27, 18, 27, 27, 27 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

As soon as a term is 9 or multiple of 9, which is true for a(4), all following ones are also multiple of 9, which never occurs in A065075.

LINKS

Table of n, a(n) for n=1..56.

CROSSREFS

Cf. A065075.

Sequence in context: A106410 A065737 A014719 * A329732 A298816 A095873

Adjacent sequences:  A139414 A139415 A139416 * A139418 A139419 A139420

KEYWORD

base,easy,nonn

AUTHOR

Philippe Lallouet (philip.lallouet(AT)orange.fr), Apr 20 2008

STATUS

approved

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Last modified April 18 07:59 EDT 2021. Contains 343084 sequences. (Running on oeis4.)