A346598 -id:A346598 - cp's OEIS frontend

A346599 Smallest k such that A344005(k) = n.

1, 3, 4, 5, 15, 7, 8, 9, 45, 11, 33, 13, 91, 35, 16, 17, 51, 19, 76, 84, 77, 23, 69, 25, 65, 27, 63, 29, 87, 31, 32, 88, 187, 85, 180, 37, 703, 247, 104, 41, 123, 43, 172, 99, 115, 47, 141, 49, 175, 255, 204, 53, 159, 135, 280, 133, 551, 59, 177, 61, 1891, 217, 64, 160, 143, 67

Offset: 1

Robert Dougherty-Bliss and N. J. A. Sloane, Jul 28 2021

nonn

			A344005(15) = 5 is the first appearance of 5 in A344005, so a(5) = 15.

Chai Wah Wu, Table of n, a(n) for n = 1..20000 (terms 1..156 from N. J. A. Sloane, terms 157..420 from Michel Marcus).

Cf. A344005, A346598.

Array[(k=1;n=1;While[m=1;While[!Divisible[m(m+1),n],m++];m!=#,n++];n)&,70] (* Giorgos Kalogeropoulos, Jul 29 2021 *)

f(n) = my(m=1); while (m*(m+1) %n, m++); m; \\ A344005
a(n) = my(k=1); while (f(k) !=n, k++); k; \\ Michel Marcus, Jul 29 2021

A346600 Indices of records in A346599.

Original entry on oeis.org

1, 2, 3, 4, 5, 9, 13, 33, 37, 61, 73, 141, 157, 193, 277, 313, 397, 421, 457, 541, 613, 661, 673, 733, 757, 877, 997, 1093, 1153, 1201, 1213, 1237, 1321, 1381, 1453, 1621, 1657, 1753, 1873, 1933, 1993, 2017, 2137, 2341, 2473, 2557, 2593, 2797, 2857, 2917, 3061

Offset: 1

Robert Dougherty-Bliss and N. J. A. Sloane, Jul 28 2021

nonn

Chai Wah Wu, Table of n, a(n) for n = 1..195

Cf. A344005, A346598, A346599, A346601.

max=0;Monitor[Do[g=(k=1;n=1;While[m=1;While[!Divisible[m(m+1),n],m++];m!=s,n++];n);If[g>max,Print@s;max=g],{s,3000}],s] (* Giorgos Kalogeropoulos, Jul 29 2021 *)

More terms from Chai Wah Wu, Jul 29 2021

cp's OEIS Frontend

A346599 Smallest k such that A344005(k) = n.

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