51509

Appears in sequences

• Semiprimes sp such that sp plus its digit sum is a perfect square.at n=36A244733
• Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000101.at n=9A259945
• Number of ordered pairs of integer partitions of n where no part of the first is greater than any part of the second.at n=26A322439
• Numbers that are the sum of six fifth powers in two or more ways.at n=10A345507
• Numbers that are the sum of six fifth powers in exactly two ways.at n=10A346357
• Standard composition numbers of compositions whose maximal runs all belong to {(1), (2,2), (3,3,3), ...}.at n=32A389530