23386

Appears in sequences

• Expansion of 1/(1-x^4-x^5-x^6-x^7-x^8-x^9-x^10).at n=39A017832
• Numbers n such that sigma(sigma(phi(n))) = sigma(sigma(n)).at n=30A172466
• Number of 2Xn 0..1 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.at n=11A222770
• Numbers n such that n!3 - 3^6 is prime.at n=31A247466
• a(n) = a(n-1) + a(n-2) + 2 a(ceiling(n/2)), where a(0) = 1, a(1) = 1, a(2) = 1.at n=18A298350