A356132 Least integer with n pentagonal divisors.

1, 5, 35, 70, 210, 420, 2310, 4620, 18480, 32340, 60060, 120120, 240240, 720720, 1261260, 1141140, 2042040, 4084080, 4564560, 13693680, 19399380, 58198140, 95855760, 38798760, 116396280, 193993800, 77597520, 232792560, 543182640, 387987600, 1125164040

Offset

1,2

Links

Table of n, a(n) for n=1..31.

Rémy Sigrist, C program

Prog

(PARI) a(n) = my(k=1); while (sumdiv(k, d, ispolygonal(d, 5)) != n, k++); k;
(C) See Links section.

Crossrefs

Cf. A000326, A130317, A279497.

Sequence in context: A117793 A145920 A356179 * A153785 A369812 A090294

Adjacent sequences: A356129 A356130 A356131 * A356133 A356134 A356135

Keyword

nonn

Author

Michel Marcus, Jul 27 2022

Extensions

More terms from Rémy Sigrist, Jul 27 2022

Status

approved