A357692 Integers k such that A037278(k) is a term of A175252.

1, 2, 4, 15, 16, 25, 60, 90, 100, 124, 150, 240, 375, 384, 600, 618, 625, 960, 1536, 3330, 3750, 4650, 5760, 10000, 10500, 10752, 15000, 16384, 17500, 24576, 25600, 40000, 49500, 62500, 102400, 139200, 168750, 198400, 323280, 526848, 960000, 1179648, 1248000, 1369125

Offset: 1

Author

Michel Marcus, Oct 10 2022

Keywords

• nonn
• base

Examples

			A037278(4) = 124, a term of A175252.
A037278(15) = 13515, a term of A175252.
A037278(16) = 124816, a term of A175252.
A037278(25) = 1525, a term of A175252.
		

Links

• David A. Corneth, Table of n, a(n) for n = 1..81

Crossrefs

Subsequence of A069872.

Cf. A037278, A175252.

Programs

PARI

is(n, {u = 10^5}) = {my(e = eval(concat(concat([""], divisors(n))))); if(e % n != 0, return(0); ); my(oldu = u, s, d); u = min(e, u); s = ""; d = divisors(factor(e, u)); d = select(x -> x <= u, d); for(i = 1, #d, s=concat(s, Str(d[i])); if(eval(s) == e, return(1)); if(eval(s) > e, return(0)); ); is(n, 10*oldu); } \\ David A. Corneth, Oct 10 2022, adapted from Michel Marcus' isok at A175252

Extensions

More terms from David A. Corneth, Oct 10 2022