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A115385
Numbers that are the product of the squares of their nonzero digits.
2
1, 914457600, 3657830400, 2662333328088524390400
OFFSET
1,2
COMMENTS
a(5) <= 471982452444268043164418193461982580062141693296640000. - Jon E. Schoenfield, Feb 07 2022
EXAMPLE
914457600 = 9^2 * 1^2 * 4^2 * 4^2 * 5^2 * 7^2 * 6^2.
CROSSREFS
Cf. A061863.
Sequence in context: A051470 A076135 A015382 * A186805 A122532 A172605
KEYWORD
base,nonn,more
AUTHOR
Giovanni Resta, Jan 21 2006
STATUS
approved