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A062855 First differences of A062851. 6
0, 1, 2, 4, 4, 7, 6, 10, 11, 13, 10, 17, 12, 19, 20, 23, 16, 26, 18, 29, 29, 31, 22, 37, 33, 37, 38, 42, 28, 47, 30, 48, 47, 49, 49, 58, 36, 55, 56, 63, 40, 66, 42, 67, 68, 67, 46, 78, 66, 77, 74, 80, 52, 85, 78, 89, 83 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..57.

EXAMPLE

a(4)=4 because there are 7 integer non-products for the 4 X 4 multiplication table (5 7 10 11 13 14 15), which is 4 more than the 3 non-products for the 3 X 3 multiplication table (5 7 8).

CROSSREFS

Cf. A027424, A062851, A062854, A062856, A062857, A062858, A062859.

Sequence in context: A164719 A104510 A082515 * A274593 A103622 A328853

Adjacent sequences:  A062852 A062853 A062854 * A062856 A062857 A062858

KEYWORD

nonn

AUTHOR

Ron A. Lalonde (ronronronlalonde(AT)hotmail.com), Jun 25 2001

STATUS

approved

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Last modified December 8 20:37 EST 2021. Contains 349596 sequences. (Running on oeis4.)