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A088116 Let n = abc..., where a, b, c, are digits of n. a(n) = a*bc...+b*ac...+c*ab...+..., i.e. a(n) = sum, over all the digits, of the product (number obtained by deleting a digit multiplied by the deleted digit). 2
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 0, 6, 12, 18, 24, 30, 36, 42, 48, 54, 0, 8, 16, 24, 32, 40, 48, 56, 64, 72, 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 0, 12, 24, 36, 48, 60, 72, 84, 96, 108, 0, 14, 28, 42, 56, 70, 84, 98 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,12

COMMENTS

First 100 terms ( for all two digit numbers) match with that of A069816. a(10a + b) = 2ab = (a+b)^2 - (a^2+b^2)= A069816(10a +b).

LINKS

Table of n, a(n) for n=1..78.

EXAMPLE

a(1234) = 234 + 2*134 + 3*124 + 4*123 = 1366.

CROSSREFS

Cf. A069816, A088117.

Cf. A087346.

Sequence in context: A241142 A271907 A069816 * A100817 A074157 A076309

Adjacent sequences:  A088113 A088114 A088115 * A088117 A088118 A088119

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Sep 25 2003

EXTENSIONS

More terms from David Wasserman, May 10 2005

STATUS

approved

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Last modified March 27 22:02 EDT 2017. Contains 284182 sequences.