22713

Appears in sequences

• Numbers k such that the smoothly undulating palindromic number (35*10^k - 53)/99 is a prime.at n=6A062218
• Number of up/down (or down/up) compositions of n into distinct parts.at n=37A129838
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1100-0111 pattern in any orientation.at n=10A146579
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, -1, 1), (-1, 0, 1), (1, 1, -1), (1, 1, 1)}.at n=8A149651
• a(n) = 144*n^2 - 127*n + 28.at n=12A156719
• Composite numbers (pseudoprimes) n, that are not Carmichael numbers, such that A000670(n) == 1 (mod n).at n=4A289338
• Greatest integer k such that k/2^n < log 2.at n=15A293362
• The integer k that minimizes |k/2^n - log 2|.at n=15A293364
• Expansion of Product_{k>=0} 1 / (1 - x^(2^k) - x^(2^(k+1)))^(2^k).at n=17A357366
• Integers k equal to the sum over A000203(t) mod t, for some steps, starting with t = k and then using the result to feed the next calculation.at n=38A377001
• Number of cycles in the n-Cameron graph.at n=4A387375