29521

Appears in sequences

• a(n) = T(2*n-1, n-1), T given by A026519.at n=8A026528
• a(n) = T(n, floor(n/2)), T given by A026519.at n=17A026530
• a(n) = T(n, floor(n/2)), where T is given by A026552.at n=17A026563
• Numbers having four 4's in base 9.at n=17A043472
• Row sums of A078938.at n=6A078940
• Numbers n such that n-1, n and n+1 can be expressed as a sum of 2 squares in at least 2 ways.at n=3A091459
• a(n) = (3^n - 7)/2.at n=8A116970
• a(n) = floor(((1+sqrt(3))/2)^n).at n=32A125895
• Centered 36-gonal numbers.at n=40A195316
• Numbers k such that (74*10^k + 133)/9 is prime.at n=21A293276
• Square array T(n,k), n>=0, k>=0, read by antidiagonals downwards, where column k is the expansion of e.g.f. exp(k*(exp(x) - 1) + x).at n=51A335975
• Nonprime numbers k whose arithmetic derivative k' (A003415) is a Fibonacci number (A000045).at n=40A362141