A072940 - OEIS

A072940

Integers which have more than one coprime factorization into nonprime powers which sum to the same number.

30030, 43890, 53130, 60060, 72930, 82110, 90090, 102102, 103740, 117810, 125970, 132090, 133980, 143220, 144210, 149730, 150150, 155610, 157080, 159390, 162690, 171570, 180180, 185640, 201630, 202020, 220110, 222870, 227010, 228228, 229710, 230230, 241230

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..33.

EXAMPLE

The term 30030 is in the list since 30030 = 65*22*21 = 39*55*14 and 65+22+21 = 108 = 39+55+14. The term 53130 = 15*22*161 = 6*77*115 (as well as 15*77*36 and 55*69*14) and 15+22+161 = 198 = 6+77+115 (and 15+77+36 = 55 + 69+ 14 = 138).

CROSSREFS

Cf. A069064.

Sequence in context: A285615 A336671 A258361 * A147573 A046324 A138206

Adjacent sequences: A072937 A072938 A072939 * A072941 A072942 A072943

KEYWORD

nonn

AUTHOR

Mike Domaratzki (mdomaratzki(AT)alumni.uwaterloo.ca), Aug 12 2002

EXTENSIONS

More terms from Sean A. Irvine, Nov 05 2024

STATUS

approved