A387534 a(n) = Product_{i=1..n} A387533(i).

8, 24, 15000, 105000, 16910355000, 179325848994707415000, 51825170359470442935000, 2438160797536373681337300735000, 15692839182097655989259566224612105000, 382732654812179731922051560652064628845000, 10957310967248770184335934359693616720962460595000

Offset

1,1

Comments

The exponents in the expansion of a(n) as a product of primes give the first n digits of the decimal expansion of Pi.

Links

Table of n, a(n) for n=1..11.

Formula

These are the partial products of A387533.

Example

a(5) = 16910355000 = 2^3 * 3^1 * 5^4 * 7^1 * 11^5.

Crossrefs

Cf. A000796, A387533.

Sequence in context: A105063 A274303 A132586 * A208400 A103953 A076444

Adjacent sequences: A387531 A387532 A387533 * A387535 A387536 A387537

Keyword

nonn,base,less

Author

Scott R. Shannon and N. J. A. Sloane, Oct 07 2025

Status

approved