A081958 -id:A081958 - cp's OEIS frontend

A081957 Triangle whose n-th row contains the n smallest numbers that are products of n distinct integers > 1, read by rows.

2, 6, 8, 24, 30, 36, 120, 144, 168, 180, 720, 840, 960, 1008, 1080, 5040, 5760, 6480, 6720, 7200, 7560, 40320, 45360, 50400, 51840, 55440, 57600, 60480, 362880, 403200, 443520, 453600, 483840, 498960, 518400, 524160, 3628800, 3991680, 4354560, 4435200, 4717440, 4838400, 4989600, 5080320, 5241600

Offset: 1

Amarnath Murthy, Apr 02 2003

			Triangle begins:
    2;
    6,   8;
   24,  30,  36;
  120, 144, 168, 180;
  ...

James Rayman, Rows n = 1..100, flattened
James Rayman, Python program

Cf. A081958, A081959, A081960.

Python
```
# See Rayman link.
```

Corrected and extended by Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 08 2003
Terms a(39) and beyond from James Rayman, Jan 17 2021
Name edited by Michel Marcus, Jan 18 2021

A081959 Row sums of A081957.

Original entry on oeis.org

2, 14, 90, 612, 4608, 38760, 361440, 3688560, 41277600, 501379200, 6576837120, 92697696000, 1397414592000, 22498705152000, 382873642905600, 6908854669516800, 131496596027596800, 2633684945988096000

Offset: 1

Amarnath Murthy, Apr 02 2003

nonn

James Rayman, Table of n, a(n) for n = 1..400

Cf. A081957, A081958, A081960.

def a(n): return sum(row(n)) # row(n) is given in A081957. - James Rayman, Jan 18 2021

Corrected and extended by Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 08 2003

More terms from David Wasserman, Jul 22 2004

A081960 Row products of A081957.

Original entry on oeis.org

2, 48, 25920, 522547200, 632073093120000, 68810005209415680000000, 922882872556916481982464000000000, 1930928443374224487368323197252403200000000000, 848408612299117898787190662782756632189835673600000000000000

Offset: 1

Amarnath Murthy, Apr 02 2003

nonn

James Rayman, Table of n, a(n) for n = 1..30

Cf. A081957, A081958, A081959.

from functools import reduce
import operator
def a(n): return reduce(operator.mul, row(n), 1) # row(n) is given in A081957. - James Rayman, Jan 18 2021

Corrected and extended by Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 08 2003

More terms from James Rayman, Jan 18 2021

cp's OEIS Frontend

A081957 Triangle whose n-th row contains the n smallest numbers that are products of n distinct integers > 1, read by rows.

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A081959 Row sums of A081957.

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A081960 Row products of A081957.

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