A358059 a(n) is the index of the smallest n-gonal pyramidal number divisible by exactly n n-gonal pyramidal numbers.

6, 7, 20, 79, 90, 203, 972, 3135, 374, 283815, 31824, 2232, 10240, 144584, 70784

Offset

3,1

Links

Table of n, a(n) for n=3..17.

Eric Weisstein's World of Mathematics, Pyramidal Number

Crossrefs

Cf. A358860.

Sequence in context: A287913 A078980 A041076 * A041771 A042757 A257312

Adjacent sequences: A358056 A358057 A358058 * A358060 A358061 A358062

Keyword

nonn,more

Author

Ilya Gutkovskiy, Dec 12 2022

Status

approved