140449

Properties

Appears in sequences

• Let T = Sum_{k >= 1} k^(k-1)*x^k be the g.f. for rooted labeled trees (A000169); sequence has g.f. T/(1-T).at n=6A088342
• Primes of the form 20*k^2 + 32*k + 13.at n=33A154414
• a(n) = 128*n^2 + 32*n + 1.at n=32A157337
• 128n^2 + 2336n + 10657.at n=23A157433
• Number of second differences of arrays of length 5 of numbers in 0..n.at n=18A228220
• Prime k with sigma(sigma(sigma(k))) < 3*k + 1.at n=30A320517
• Centered octachoral numbers.at n=11A365206
• Prime numbersat n=13048