A360298 -id:A360298 - cp's OEIS frontend

A360299 a(n) is the number of terms in the n-th row of A360298.

1, 1, 1, 1, 1, 2, 2, 3, 5, 10, 10, 15, 15, 29, 44, 73, 73, 136, 136, 264, 383, 740, 740, 1418, 2440, 4727, 7831, 15154, 15154, 25836, 25836, 46502, 69638, 139276, 240132, 447972, 447972, 880859, 1343707, 2448270, 2448270, 4742231, 4742231, 9309245, 17932278

Offset: 1

Rémy Sigrist, Feb 02 2023

nonn

			For n = 9:
- the 9th row of A360298 is (10080, 70, 5670, 4480, 362880),
- so a(9) = 5.

Rémy Sigrist, PARI program

Cf. A360298.

PARI
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See Links section.
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a(n) <= a(n+1) <= 2*a(n).

a(p) = a(p-1) for any prime number p.

A360300 a(n) is the least term in the n-th row of A360298.

Original entry on oeis.org

1, 2, 6, 24, 120, 20, 140, 630, 70, 7, 77, 924, 12012, 858, 5720, 12870, 218790, 12155, 230945, 46189, 969969, 176358, 4056234, 676039, 676039, 104006, 312018, 44574, 1292646, 1077205, 33393355, 66786710, 2203961430, 64822395, 90751353, 90751353, 3357800061

Offset: 1

Rémy Sigrist, Feb 02 2023

nonn

			For n = 9:
- the 9th row of A360298 is (10080, 70, 5670, 4480, 362880),
- so a(9) = 70.

Cf. A008336, A360298.

{ for (n = 1, 37, if (n==1, r = [1], r = setunion(select(v -> v%n==0, r)/n, r*n)); print1 (r[1]", ")) }

a(n) <= A008336(n+1).

a(p) = p * a(p-1) for any prime number p.

cp's OEIS Frontend

A360299 a(n) is the number of terms in the n-th row of A360298.

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