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A049993 a(n)=number of arithmetic progressions of 3 or more positive integers, nondecreasing with sum <=n. 0
0, 0, 1, 2, 3, 6, 7, 9, 13, 16, 17, 24, 25, 28, 36, 40, 41, 51, 52, 58, 68, 72, 73, 87, 91, 95, 107, 114, 115, 134, 135, 141, 155, 160, 167, 189, 190, 195, 211, 223, 224, 248, 249, 257, 282, 288, 289, 316, 320, 332, 353, 362, 363 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..53.

CROSSREFS

Sequence in context: A153348 A246647 A177729 * A167793 A262932 A018423

Adjacent sequences:  A049990 A049991 A049992 * A049994 A049995 A049996

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified March 25 20:10 EDT 2019. Contains 321477 sequences. (Running on oeis4.)