A076583 - OEIS

A076583

Triangular numbers which are 9-almost primes.

25200, 61776, 195000, 248160, 270480, 295296, 306936, 320400, 346528, 373680, 400960, 446040, 460320, 461280, 499500, 662976, 664128, 749700, 818560, 902496, 903840, 946000, 1037520, 1155960, 1185030, 1664400, 1721440, 1873080, 1888596

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..29.

EXAMPLE

a(1)=25200, 25200 is a triangular number and 25200=2*2*2*2*3*3*5*5*7 i.e. is a product of 9 prime factors so is 9-almost prime.

CROSSREFS

Sequence in context: A253530 A190319 A296097 * A226501 A046709 A179723

Adjacent sequences: A076580 A076581 A076582 * A076584 A076585 A076586

KEYWORD

base,easy,nonn

AUTHOR

Shyam Sunder Gupta, Oct 19 2002

STATUS

approved