A077515 - OEIS

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A077515

Smallest n-digit number beginning with n and having n divisors, or 0 if no such number exists.

3

1, 23, 361, 4006, 0, 600004, 0, 80000001, 900060001, 1000000016, 0, 120000000020, 0, 14000000002112, 150000300946521, 1600000000000005, 0, 180000000000000639, 0, 20000000000000000048, 210000002255164326976, 2200000000000000037888, 0, 240000000000000000000004

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

a(5) = 0 as 13^4 = 28561 < 50000 < 59999 < 83521 = 17^4.

CROSSREFS

Sequence in context: A180361 A021684 A138578 * A025942 A020000 A021664

Adjacent sequences: A077512 A077513 A077514 * A077516 A077517 A077518

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Nov 08 2002

EXTENSIONS

More terms from Ray Chandler, Aug 14 2003

a(24) from Jon E. Schoenfield, Mar 17 2022

STATUS

approved