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A049983 a(n)=number of arithmetic progressions of 2 or more positive integers, strictly increasing with sum <= n. 0
0, 0, 1, 2, 4, 7, 10, 13, 19, 24, 29, 37, 43, 50, 62, 70, 78, 92, 101, 112, 129, 141, 152, 171, 185, 199, 221, 237, 251, 278, 293, 310, 337, 356, 377, 409, 427, 448, 480, 505, 525, 563, 584, 609, 651, 677, 700, 742, 768, 800, 843 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..51.

CROSSREFS

Sequence in context: A126022 A194172 A173537 * A168112 A170894 A151986

Adjacent sequences:  A049980 A049981 A049982 * A049984 A049985 A049986

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 23 18:54 EST 2019. Contains 320438 sequences. (Running on oeis4.)