22593

Appears in sequences

• a(n) = T(2*n, n), where T is given by A026584.at n=8A026590
• a(n) = T(n, floor(n/2)), where T is given by A026584.at n=16A026595
• a(1)=1. a(n) = a(n-1)th integer from among those positive integers which do not occur earlier in the sequence and which are coprime to n.at n=15A121219
• Number of base 23 n-digit numbers with adjacent digits differing by five or less.at n=4A126544
• Binomial transform of [1, 7, 17, 17, 6, 0, 0, 0, ...].at n=16A132117
• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1000-1111-1000 pattern in any orientation.at n=15A147129
• 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, 0, 1), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.at n=10A148364
• Composite numbers k coprime to 13 such that k divides A006190(k) - Kronecker(13,k).at n=25A327654