A218145 -id:A218145 - cp's OEIS frontend

A218215 Product of the nonzero digits (in base 10) of n^4.

1, 6, 8, 60, 60, 108, 8, 216, 180, 1, 96, 252, 480, 576, 300, 2700, 240, 1512, 18, 6, 1152, 1440, 4032, 2646, 1620, 45360, 240, 4320, 784, 8, 540, 6720, 720, 2916, 300, 13608, 1344, 1440, 288, 60, 6720, 972, 768, 36288, 240, 94080, 96768, 2880, 6720, 60, 2520, 756, 16128, 3600, 2700, 186624, 150, 3888, 252, 108

Offset: 1

Jonathan Vos Post, Oct 23 2012

This is to 4 as A218145 Product of the nonzero digits (in base 10) of n^3, is to 3. Similar to A053668, which does not exclude zero digits from the product. This is to the 4th powers A000583 as cubes A000578 are to A218145, and as A218072 is to the squares A000290.

Cf. A000583, A007954, A053668, A218072, A218145.

Table[Times @@ Select[IntegerDigits[n^4], # > 0 &], {n, 60}]

A218311 Product of the nonzero digits (in base 10) of n^5.

Original entry on oeis.org

1, 36, 576, 64, 900, 4235364, 112896, 4064256, 2624400, 1, 900, 9437184, 1285956, 45158400, 1093955625, 45158400, 101606400, 19110297600, 740710656, 36, 16384, 7290000, 241864704, 1316818944, 12859560000, 65028096, 585252864, 4064256, 129600, 576, 74649600

Offset: 1

Jonathan Vos Post, Oct 25 2012

This is to 5 as A218145, product of the nonzero digits (in base 10) of
n^3, is to 3. Similar to A053668, which does not exclude zero digits
from the product.  This is to the 5th powers A000584 as cubes A000578
are to A218145, and as A218072 is to the squares A000290.

			a(3) = 36 because 3^5 = 243, and 2*4*3 = 36.

Cf. A000584, A007954, A053668, A218072, A218145.

Table[Times @@ Select[IntegerDigits[n^5], # > 0 &], {n, 60}]

cp's OEIS Frontend

A218215 Product of the nonzero digits (in base 10) of n^4.

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