25072

Appears in sequences

• Coordination sequence for MgNi2, Position Ni2.at n=39A009932
• Polynomial extrapolation of 2, 3, 5, 7, 11.at n=23A061165
• Number of permutations p of (1,2,3,...,n) such that Sum_{k=1..n} (p(k) mod k) = n.at n=9A073344
• Number of partitions of an n-element set avoiding the pattern 12|3.at n=11A128816
• Numbers m such that gcd(s1,s2) = number of the Collatz iterations of m where s1 is the sum of the odd terms and s2 the sum of the even terms in the Collatz trajectory.at n=5A281195
• Number of compositions of n into parts with distinct multiplicities and with exactly eight parts.at n=34A321778
• Record values of A338565.at n=29A338928
• Triangle read by rows: T(n,k) = number of free polyominoes with n cells, where the maximum number of cells in any row or column is k.at n=70A377941
• G.f.: Product_{k>=1} (1 + x^(2*k^2)) / (1 - x^k).at n=34A385009