732736

Appears in sequences

• Squares using only squarefree digits (2, 3, 5, 6, 7).at n=26A077676
• Smith square numbers.at n=18A098839
• E.g.f: exp(x/(1-3*x))/sqrt(1-9*x^2).at n=6A115328
• Triangle, read by rows, where T(n,k) = A049020([n/2],k)*A049020([(n+1)/2],k).at n=44A124526
• Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 1 1 vertically.at n=6A207926
• Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 1 1 vertically.at n=5A207933
• Primitive numbers whose abundance is positive and odd.at n=37A259231
• Squares k (not ending in 0) such that the integer that is built up by concatenating the floors of the square roots of the two-digit numbers into which the original number is separated (from right to left) is the square root of the original number.at n=42A294497
• Number of n X 6 0..1 arrays with each 1 adjacent to 3, 4 or 6 king-move neighboring 1's.at n=6A297018
• Number of nX7 0..1 arrays with each 1 adjacent to 3, 4 or 6 king-move neighboring 1s.at n=5A297019
• Terms of A216427 that are the sum of two coprime terms of A216427.at n=19A307134
• Numbers that have exactly one Zumkeller divisor but are not Zumkeller.at n=29A376877