A036332 Composite numbers n such that juxtaposition of prime factors of n has length 8.

256, 384, 576, 640, 704, 832, 864, 896, 960, 1056, 1088, 1216, 1248, 1296, 1344, 1440, 1472, 1584, 1600, 1632, 1760, 1824, 1856, 1872, 1936, 1944, 1984, 2016, 2080, 2160, 2208, 2240, 2288, 2368, 2376, 2400, 2448, 2464, 2624, 2640, 2704, 2720, 2736

Offset

1,1

Comments

The last term of this sequence is a(8779116)=99691027.

Links

Nathaniel Johnston, Table of n, a(n) for n = 1..10000

Maple

isA036332 := proc(n) local d: d:=ifactors(n)[2]: return `if`(not isprime(n) and add(length(d[j][1])*d[j][2], j=1..nops(d))=8, n, NULL): end: seq(isA036332(n), n=2..2736); # Nathaniel Johnston, Jun 22 2011

Crossrefs

Cf. A036326-A036334.

Sequence in context: A345786 A186473 A046309 * A114987 A046310 A115176

Adjacent sequences: A036329 A036330 A036331 * A036333 A036334 A036335

Keyword

nonn,base,fini,easy

Author

Patrick De Geest, Dec 15 1998

Status

approved