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A118137 Sum of decimal digits of two successive natural numbers. 1
1, 3, 5, 7, 9, 11, 13, 15, 17, 10, 3, 5, 7, 9, 11, 13, 15, 17, 12, 5, 7, 9, 11, 13, 15, 17, 19, 21, 14, 7, 9, 11, 13, 15, 17, 19, 21, 23, 16, 9, 11, 13, 15, 17, 19, 21, 23, 25, 18, 11, 13, 15, 17, 19, 21, 23, 25, 27, 20, 13, 15, 17, 19, 21, 23, 25, 27, 29, 22, 15, 17, 19, 21, 23 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..74.

MAPLE

read("transforms") ;

A118137 := proc(n)

        digsum(n)+digsum(n+1) ;

end proc: # R. J. Mathar, Apr 03 2012

CROSSREFS

Sequence in context: A187907 A024806 A084834 * A160931 A160924 A063280

Adjacent sequences:  A118134 A118135 A118136 * A118138 A118139 A118140

KEYWORD

base,easy,nonn

AUTHOR

Giovanni Teofilatto, May 13 2006

STATUS

approved

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Last modified April 24 12:01 EDT 2019. Contains 322429 sequences. (Running on oeis4.)