72541

Appears in sequences

• Numbers k such that sigma(k+1) = 2*phi(k).at n=19A067260
• a(n) = 3*n^4 + 6*n^3 - 3*n + 1.at n=12A181475
• Number of nX7 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1s.at n=2A297313
• T(n,k)=Number of nXk 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1s.at n=38A297314
• Number of 3Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1s.at n=6A297316
• Centered hexagonal numbers that are sphenic numbers.at n=15A382628