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A374501
Pentagonal pyramidal numbers that are products of smaller pentagonal pyramidal numbers.
4
1, 56448, 127008, 259200, 5644800, 31840200, 42688800, 60766200, 116493300, 130662720, 193179168, 442828800, 499000500, 897544800, 917632800, 3624409800, 6914880000, 13831171200, 15410656800, 31246000128, 53936416800, 64024732800, 72945774720, 88957620000
OFFSET
1,2
EXAMPLE
1 is a term because it is a pentagonal pyramidal number and equals the empty product.
56448 is a term because it is a pentagonal pyramidal number and equals the product of the pentagonal pyramidal numbers 196 and 288.
127008 is a term because it is a pentagonal pyramidal number and equals the product of the pentagonal pyramidal numbers 6, 6, 18, and 196.
CROSSREFS
Row n=5 of A374498.
Sequence in context: A234488 A348100 A184613 * A202433 A329270 A190836
KEYWORD
nonn
AUTHOR
STATUS
approved