A359094 a(n) is the smallest square pyramidal number divisible by exactly n square pyramidal numbers.

1, 5, 30, 140, 4900, 155155, 6930, 223300, 3573570, 380380, 340889640, 1801800, 333833500, 711410700, 78963134250, 427826509110, 70836325560, 862289508080, 62366724420, 3975527876320, 2279301054030, 3422848288860, 58264695188700, 4903512426212400

Offset

1,2

Links

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

Eric Weisstein's World of Mathematics, Square Pyramidal Number

Index entries for sequences related to divisors of numbers

Example

a(5) = 4900, because 4900 is a square pyramidal number that has 5 square pyramidal divisors {1, 5, 14, 140, 4900} and this is the smallest such number.

Crossrefs

Cf. A000330, A005179, A130279, A358543, A359095.

Sequence in context: A282078 A080951 A375253 * A255052 A282086 A180285

Adjacent sequences: A359091 A359092 A359093 * A359095 A359096 A359097

Keyword

nonn

Author

Ilya Gutkovskiy, Dec 16 2022

Extensions

a(11)-a(24) from Jon E. Schoenfield, Dec 17 2022

Status

approved